
Englandspiel ('England Game'), or Operation North Pole (), was a successful
counterintelligence
Counterintelligence (counter-intelligence) or counterespionage (counter-espionage) is any activity aimed at protecting an agency's Intelligence agency, intelligence program from an opposition's intelligence service. It includes gathering informati ...
operation of the (German military intelligence) from 1942 to 1944 during
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. German counter-intelligence operatives, headed by
Hermann Giskes of the
Abwehr
The (German language, German for ''resistance'' or ''defence'', though the word usually means ''counterintelligence'' in a military context) ) was the German military intelligence , military-intelligence service for the ''Reichswehr'' and the ...
and Joseph Schreider of the
Sicherheitsdienst
' (, "Security Service"), full title ' ("Security Service of the ''Reichsführer-SS''"), or SD, was the intelligence agency of the Schutzstaffel, SS and the Nazi Party in Nazi Germany. Established in 1931, the SD was the first Nazi intelligence ...
(SD), captured
Allied resistance agents operating in the
Netherlands
, Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
and used the agents' radios and codes to dupe the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
's clandestine organization, the
Special Operations Executive
Special Operations Executive (SOE) was a British organisation formed in 1940 to conduct espionage, sabotage and reconnaissance in German-occupied Europe and to aid local Resistance during World War II, resistance movements during World War II. ...
(SOE), into continuing to infiltrate agents, weapons, and supplies into the Netherlands. The Germans captured nearly all the agents and weapons sent by the United Kingdom (Britain).
Englandspiel was a "catastrophe" for SOE and the
Dutch resistance
The Dutch resistance () to the History of the Netherlands (1939–1945), German occupation of the Netherlands during World War II can be mainly characterized as non-violent. The primary organizers were the Communist Party of the Netherlands, C ...
, "a textbook illustration, the world over, in how not to conduct clandestine work." Fifty-four SOE agents sent from England were captured by the Germans and only four survived. The other fifty were executed or died in
concentration camps
A concentration camp is a prison or other facility used for the internment of political prisoners or politically targeted demographics, such as members of national or ethnic minority groups, on the grounds of national security, or for exploit ...
. The Dutch resistance was substantial in numbers but lacked weapons. If armed, as had been the objective of SOE, it might have played an important role helping the allied military forces in their failed attempt to expel the Germans from the Netherlands in 1944.
Background
The Special Operations Executive (SOE) was created by the United Kingdom on July 22, 1940, in accordance with Prime Minister
Winston Churchill
Sir Winston Leonard Spencer Churchill (30 November 1874 – 24 January 1965) was a British statesman, military officer, and writer who was Prime Minister of the United Kingdom from 1940 to 1945 (Winston Churchill in the Second World War, ...
's directive to "set Europe ablaze." The objective of the SOE was to undertake "
irregular warfare
Irregular warfare (IW) is defined in United States joint doctrine as "a violent struggle among state and non-state actors for legitimacy and influence over the relevant populations" and in U.S. law as "Department of Defense activities not involvin ...
" with sabotage and subversion in countries occupied by
Nazi Germany
Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
and other
Axis powers
The Axis powers, originally called the Rome–Berlin Axis and also Rome–Berlin–Tokyo Axis, was the military coalition which initiated World War II and fought against the Allies of World War II, Allies. Its principal members were Nazi Ge ...
. SOE agents in occupied countries allied themselves with
resistance groups and supplied them with weapons and equipment parachuted in from England. Section N was created within SOE to deal with the Netherlands. Section N had four chiefs during the war: RV Laming, Charles Blizard (known as Blunt), Seymour Bingham, and RI Dobson. In the words of
MRD Foot, official historian of the SOE, Section N was "not always noted for efficiency."
The opposite numbers of the SOE leaders in the German-occupied Netherlands were Majors
Hermann Giskes of the
Abwehr
The (German language, German for ''resistance'' or ''defence'', though the word usually means ''counterintelligence'' in a military context) ) was the German military intelligence , military-intelligence service for the ''Reichswehr'' and the ...
and Joseph Schreieder of the
Sicherheitsdienst
' (, "Security Service"), full title ' ("Security Service of the ''Reichsführer-SS''"), or SD, was the intelligence agency of the Schutzstaffel, SS and the Nazi Party in Nazi Germany. Established in 1931, the SD was the first Nazi intelligence ...
(SD), the intelligence service of the
SS.
The Netherlands presented geographical challenges to the
Dutch resistance
The Dutch resistance () to the History of the Netherlands (1939–1945), German occupation of the Netherlands during World War II can be mainly characterized as non-violent. The primary organizers were the Communist Party of the Netherlands, C ...
and the
British
British may refer to:
Peoples, culture, and language
* British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies.
* British national identity, the characteristics of British people and culture ...
intelligence agencies wishing to infiltrate agents and supply arms and supplies to the resistance groups. The country was densely populated and lacked forests and mountains where resistance forces could hide; isolated areas suitable for landing aeroplanes or parachute drops of arms and supplies for the resistance were hard to find; the coast was flat and the beaches guarded and often mined by the Germans, offering little opportunity to bring in agents and supplies by boat or submarine. Moreover, the Netherlands did not border any neutral, unoccupied country which could be used as a staging ground for resistance activities.
Bad beginning
In late summer 1941, a Dutch agent of the British intelligence agency
MI6
The Secret Intelligence Service (SIS), commonly known as MI6 ( Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of human intelligenc ...
was arrested by the Germans in the Netherlands. He had with him a large number of coded messages, and a German cryptographer, Sergeant E. G. May, learned the MI6 cipher system. In February 1942, two MI6 agents were captured in the Netherlands, which added to the German knowledge of the British codes. At the time, SOE depended upon MI6 for its communications and ciphers.
Meanwhile, SOE was training Dutch agents to infiltrate into the Netherlands to help a fledgling resistance movement. The agents complained about the deficiencies of their training program. They were given clothing easily identifiable as British to be worn in the Netherlands, security was lax and SOE could not provide the agents in training with names and addresses of contacts and safe houses that they would need in the Netherlands. In response, the British confined the disaffected trainees and released them only in December 1941 after a complaint by the Dutch government-in-exile in England, and the agents signed an agreement to remain silent about their complaints.
SOE's first two Dutch agents, wireless operator
Huub Lauwers and saboteur Thys Taconis, parachuted into the Netherlands on the night of 6/7 November 1941. Lauwers was captured on 6 March 1942. He was persuaded to send messages to SOE in London, but he omitted from the messages the two security checks (deliberate errors) that were required to be introduced into messages by the sending agent, the scheme for which was known only to the agent and SOE. The presence of security checks in messages indicated that the sender was the legitimate agent and was acting under free will. The absence of security checks represented a vitally-important
duress code, which should have warned SOE that the sender was either an impostor or a legitimate agent who had been captured and
coerced into working for the Nazis. Repeatedly ignoring the significance of the absent security checks was a serious violation of the SOE's own transmission protocol. However, SOE London ignored the absence of the security checks and accepted the messages as genuine. Lauwers continued to transmit messages without the security checks and even inserted the letters CAU and GHT ("Caught") at the beginning and end of messages. SOE London paid no attention.
The messages that Lauwers transmitted as a prisoner of the Germans included requests that additional agents and supplies be sent to the Netherlands. SOE responded positively. Agents and supplies, including weapons, were usually flown out of Britain at night and dropped by parachute from converted
Handley Page Halifax
The Handley Page Halifax is a British Royal Air Force (RAF) four-engined heavy bomber of the Second World War. It was developed by Handley Page to the same specification as the contemporary twin-engine Avro Manchester.
The Halifax has its or ...
bombers or landed in fields by
Westland Lysander
The Westland Lysander is a British Army cooperation aircraft, army co-operation and liaison aircraft produced by Westland Aircraft that was used immediately before and during the Second World War.
After becoming obsolete in the army co-operat ...
STOL
A short takeoff and landing (STOL) aircraft is a fixed-wing aircraft that can takeoff/land on short runways. Many STOL-designed aircraft can operate on airstrips with harsh conditions (such as high altitude or ice). STOL aircraft, including tho ...
aircraft. SOE air operations were based at
RAF Tempsford
Royal Air Force Tempsford or more simply RAF Tempsford is a former Royal Air Force station located north east of Sandy, Bedfordshire, England and south of St. Neots, Cambridgeshire, England.
The airfield was home to 138 (Special Duty) Sq ...
. The agents and supplies were met on arrival and captured by the Germans.
Playing England
Several captured Dutch radio operators continued broadcasting encrypted messages but without security checks, which should have alerted SOE that they had been compromised. SOE's head of codes
Leo Marks
Leopold Samuel Marks, (24 September 1920 – 15 January 2001) was an English writer, screenwriter, and cryptographer. During the Second World War he headed the codes office supporting resistance agents in occupied Europe for the secret Special ...
later claimed to have realised that unlike all other coded messages from agents in other countries, the Dutch messages contained no errors. He reasoned that was because they were coded not in the field by harried and harassed wireless operators but by expert German cryptographers. The Dutch messages were too good to be genuine. In the documentary ''Churchill's Secret Army'', Marks recounts how a wireless operator ended a telegraphic radio communication with "HH", which stood for ''Heil Hitler'' and was the usual closing for German communications. The other party instantly replied "HH", which indicated that the transmitter was a German who was used to adding "HH" to messages automatically and not a British agent, who would have been confused by the two letters. Finally, Marks sent a Dutch agent in the Netherlands a deliberately garbled message. Marks reasoned that no ordinary SOE agent could decrypt the message, but the German cryptographers would. The Dutch agent responded to the garbled message, which indicated to Marks that he was transmitting under the control of the Germans. Marks reported the findings to his superior, who told him to not discuss the matter with anybody else; no action was taken.
German wireless operators reported mock resistance groups and sabotage successes to SOE London. When SOE London requested for an agent return to England, he would suddenly meet with a calamity of some sort and so he could not return. In January 1943, Marks wrote a report to SOE leaders about his suspicions that all or nearly all SOE agents in the Netherlands were in German hands, but it was months before any action was taken. Neither the Dutch section, overseeing operations in the Netherlands nor other services were notified of his suspicions. The failure of SOE leadership to respond to signs that the Dutch program was controlled by the Germans was probably motivated by both denial of warning signs and interdepartmental competition between SOE and the rival
Secret Intelligence Service
The Secret Intelligence Service (SIS), commonly known as MI6 (MI numbers, Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of Human i ...
("C") from which SOE had been created.
End
In the fall of 1943, two Dutch SOE agents, Pieter Dourlein and John Ubbink, escaped from Haaren prison, made their way to
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
, and reported Englandspiel to the Dutch legation there, which passed the information along to the British government. The two agents then used one of the
escape and evasion lines to get to
Spain
Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
and hence to London. The Abwehr's Giskes, however, anticipated their arrival by sending a fake message, ostensibly from another SOE agent, that Dourlein and Ubbink were
turncoats who became German agents. Both were imprisoned on their arrival in London and remained in a British prison until after the
Normandy invasion
Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful liberation of German-occupied Western Europe during World War II. The operation was launched on 6 June 1944 ( D-Day) with the ...
in June 1944. They were later honoured by the Dutch government.
Englandspiel was already on its last legs in the fall of 1943. The
Royal Air Force
The Royal Air Force (RAF) is the Air force, air and space force of the United Kingdom, British Overseas Territories and Crown Dependencies. It was formed towards the end of the World War I, First World War on 1 April 1918, on the merger of t ...
(RAF), which supplied the planes and pilots for SOE, had suspended SOE flights to the Netherlands after May 1943 because of the high casualties to aircraft and airmen. The RAF had noticed that its flights to the Netherlands always arrived without opposition and that landing areas were "too bloody perfect", but planes were fired upon during their return trip to England and suffered unusually-high losses. In less than a year, 12 RAF aircraft were shot down during their return flight from SOE missions in the Netherlands.
The end of Englandspiel came on 1 April 1944, with Giskes sending a taunting message to SOE complaining about the lack of recent business from England given that he had been servicing them for so long. Giskes' message also promised a warm welcome to any further agents SOE wished to insert into the Netherlands.
Aftermath

The fifty Dutch SOE agents that had been captured by the Germans were transported to
Mauthausen concentration camp
Mauthausen was a German Nazi concentration camp on a hill above the market town of Mauthausen, Upper Austria, Mauthausen (roughly east of Linz), Upper Austria. It was the main camp of a group with List of subcamps of Mauthausen, nearly 100 f ...
in September 1944 as allied military forces were advancing into the Netherlands, and eventually executed. Giskes, the Abwehr mastermind of Englandspiel, was arrested by the British, but after the war was employed by the United States during the
occupation of Germany
The entirety of Germany was occupied and administered by the Allies of World War II, from the Berlin Declaration on 5 June 1945 to the establishment of West Germany on 23 May 1949. Unlike occupied Japan, Nazi Germany was stripped of its sove ...
.
Some of the officials of the
Dutch government-in-exile
The Dutch government-in-exile (), also known as the London Cabinet (), was the government in exile of the Netherlands, supervised by Queen Wilhelmina, that fled to London after the German invasion of the country during World War II on 10 May 19 ...
in London refused to cooperate with SOE when the details of Englandspiel became known to them. They were ordered to do so by the Dutch
Prince Bernhard, and a fresh start was made in mid-to-late 1944 under new leadership at SOE. Twenty-five well equipped and trained sabotage teams of two Dutch agents each were parachuted into the Netherlands. However, engendered by Englandspiel the British distrusted the Dutch resistance which prevented it from having an impact in
Operation Market Garden, the unsuccessful offensive by allied military forces in the Netherlands in September 1944. The spearhead of the British forces, the First British Airborne Division, was ordered not to cooperate with the resistance. Had it not been ignored, the resistance would have been helpful in providing badly needed intelligence and communications to the division which had to be withdrawn from the battlefield after heavy losses.
Conspiracy theories in the Netherlands alleged that a traitor in SOE caused the Englandspiel and that Dutch agents were sacrificed to conceal allied plans for an invasion of the Netherlands. "For many, it was simply impossible to fathom how the devastation caused by ''das Englandspiel'' could have been the result of stupidity and ineptness." The contrary and more accepted view of M.R.D Foot is that “the agents were victims of sound police work on the German side, assisted by Anglo-Dutch incompetence in London."
Agents

During the ''Englandspiel'' the following agents (amongst others) were dropped in the Netherlands:

* 28 August 1940: Lodo van Hamel, sent to
Oegstgeest
Oegstgeest () is a town and municipality in the province of South Holland in the western Netherlands. Its population was in .
Etymology
The portion ''geest'' in the name refers to the Geest, geest lands, which were excavated in the seventeent ...
in
South Holland
South Holland ( ) is a province of the Netherlands with a population of over 3.8 million as of January 2023 and a population density of about , making it the country's most populous province and one of the world's most densely populated areas. ...
.
* 5 July 1941: Aart Alblas, dropped near
Nieuweschans in
Groningen
Groningen ( , ; ; or ) is the capital city and main municipality of Groningen (province), Groningen province in the Netherlands. Dubbed the "capital of the north", Groningen is the largest place as well as the economic and cultural centre of ...
, arrested 16 July 1942.
* 6 November 1941: Huub Lauwers and Thijs Taconis, dropped near
Ommen in
Overijssel
Overijssel (; ; ; ) is a Provinces of the Netherlands, province of the Netherlands located in the eastern part of the country. The province's name comes from the perspective of the Prince-Bishopric of Utrecht, Episcopal principality of Utrecht ...
. Lauwers was arrested on 6 March 1942, Taconis on 9 March 1942.
* 9 December 1941: Wim van der Reijden, sent to
Scheveningen
Scheveningen () is one of the eight districts of The Hague, Netherlands, as well as a subdistrict () of that city. Scheveningen is a modern seaside resort with a long, sandy beach, an esplanade, a pier, and a lighthouse. The beach is popular ...
, arrested on 13 February 1942.
* 23 February 1942: Evert Radema and E.W. de Jonge, sent to
Katwijk aan Zee
Katwijk aan Zee (literally, ''Katwijk-on-Sea'') is a seaside resort located on the North Sea at the mouth of the Oude Rijn (Utrecht and South Holland), Oude Rijn. It is situated in the municipality of Katwijk and the province of South Holland.
...
, Radema was arrested on 29 May 1942, De Jonge on 22 May 1942.
* 28 February 1942: Gerrit Dessing, dropped near
Ermelo in
Gelderland
Gelderland ( , ), also known as Guelders ( ) in English, is a Provinces of the Netherlands, province of the Netherlands, located in the centre-east of the country. With a total area of of which is water, it is the largest province of the Nethe ...
, returned via
Brussels
Brussels, officially the Brussels-Capital Region, (All text and all but one graphic show the English name as Brussels-Capital Region.) is a Communities, regions and language areas of Belgium#Regions, region of Belgium comprising #Municipalit ...
to England on 2 September 1943.
* 27 March 1942: Nol Baatsen, dropped near Kallenkote, east of
Steenwijk in Overijssel and immediately arrested
* 29 March 1942: Jan Molenaar and Leo Andringa, dropped near
Holten in Overijssel; Molenaar was injured and committed suicide (
by pill), Andringa was arrested on 28 April 1942.
* 29 March 1942: Gosse Ras and Han Jordaan, dropped near Holten in Overijssel, Ras was arrested on 1 May 1942, Jordaan two days later.
* 5 April 1942: Henk Sebes and Barend Kloos, dropped near Harskamp,
Ede in Gelderland, Sebes was arrested on 8 May 1942, Kloos on 29 April 1942.
* 18 April 1942: Jan de Haas (as a replacement for Molenaar), brought to
Castricum, arrested on 28 April 1942.
* 29 May 1942: Herman Parleviet and Toon van Steen, dropped near Kallenkote, east of Steenwijk in Overijssel and arrested immediately.
* 22 June 1942: Jan van Rietschoten and Jo Buizer, dropped near Holten in Overijssel and arrested immediately.
* 26 June 1942: George Jambroes and Jozef Bukkens, dropped near Kallenkote, east of Steenwijk in Overijssel and arrested immediately.
* 23 July 1942: Gerard Jan van Hemert, dropped near Holten in Overijssel and arrested immediately.
* 24 September 1942: Karel Beukema toe Water and Cees Droogleever Fortuyn, dropped near
Balloo in
Drenthe
Drenthe () is a province of the Netherlands located in the northeastern part of the country. It is bordered by Overijssel to the south, Friesland to the west, Groningen to the north, and the German state of Lower Saxony to the east. As of Jan ...
and arrested immediately.
* 24 September 1942: Mooy and Jongelie, dropped and immediately arrested.
* 1 October 1942: Aart van Giessen, dropped and immediately arrested.
* 21 October 1942: Meindert Koolstra, dropped near Ermelo in Gelderland and arrested immediately.
* 23 October 1942: Jan Hofstede and Christiaan Pouwels, dropped near Holten in Overijssel and immediately arrested.
* 28 November 1942: de Kruijff and Charle Ruseler, dropped and immediately arrested.
* 29 November 1942: John Ubbink and Herman Overes, dropped and immediately arrested.
* 13 February 1943:
Trix Terwindt, dropped and immediately arrested.
* 16 February 1943: Van de Nor, Kees Hulsteijn and Braggaar, dropped and immediately arrested.
* 18 February 1943: Gerrit van Os and Jan Kist, dropped near
Voorthuizen
Voorthuizen ( Dutch Low Saxon: ''Voorthuzen'') is a village in the municipality of Barneveld, in the Dutch province of Gelderland.
Tourism
Voorthuizen is a tourist village, located on the edge of the Veluwe. East of the village is a high ...
in Gelderland and immediately arrested.
* 18 February 1943: Wim van der Wilden and his cousin Piet van der Wilden, dropped and immediately arrested.
* 19 February 1943: Pieter Dourlein, dropped near Ermelo in Gelderland and immediately arrested.
* 21 April 1943: Klaas Wegner, Freek Rouwers and Ivo Uytvanck, dropped and immediately arrested.
* 21 May 1943: Oscar de Brey, Anton Mink and Laurens Punt, dropped and immediately arrested.
* 7 October 1944: (After the end of Englandspiel) Harmen Koopmans and G. Ensink, dropped at
Dokkum
Dokkum is a Dutch fortified city in the municipality of Noardeast-Fryslân in the province of Friesland. It has 12,669 inhabitants (February 8, 2020). The fortifications of Dokkum are well preserved and are known as the ''bolwerken'' (bulwarks) ...
and immediately arrested. Koopmans killed at De Woeste Hoeve near
Apeldoorn
Apeldoorn (; Dutch Low Saxon: ) is a municipality and city in the province of Gelderland in the centre of the Netherlands. The municipality of Apeldoorn, including the villages of Beekbergen, Loenen (Apeldoorn), Loenen, Ugchelen and Hoenderloo ...
.
In popular culture
* ''Englandspiel'' is the basis for the 1956 Italian film 'London chiama Polo Nordo/The House of Intrigue', directed by Duilio Coletti with Curt Jurgens, and based upon the novel by Hermann J. Giskes, head of the German wartime counterespionage ''Abwehr'' in the Netherlands.
* The ''Englandspiel'' is also featured in the Dutch World War II adventure novel trilogy
Vliegers in het Vuur (1963) by the Dutch author
Klaas Norel.
* The ''Englandspiel'' is mentioned implicitly in
John le Carré
David John Moore Cornwell (19 October 193112 December 2020), better known by his pen name John le Carré ( ), was a British author, best known for his espionage novels, many of which were successfully adapted for film or television. A "sophist ...
's 1965 satirical spy novel
The Looking Glass War. British spy and old hand Fred Leiser, who is to infiltrate East-Germany with an obsolete radioset in the Cold War, was one of the very few agents sent by the British who survived in The Netherlands during World War II.
* The 1977 Dutch movie
Soldier of Orange (Dutch title: ''Soldaat van Oranje'') by
Paul Verhoeven
Paul Verhoeven (; born 18 July 1938) is a Dutch filmmaker, who has worked variously in the Netherlands, the United States, and in France. He is known for directing genre films with strong satirical elements, often featuring graphic violence and ...
was based on an autobiographical novel by
Erik Hazelhoff Roelfzema and dramatises the wartime history of the Englandspiel. A successful long-running musical ''Soldaat van Oranje'' was performed in the Netherlands since 2010 and treats the same subject matter.
* ''Englandspiel'' is the subject of the "Confusion Was Their Business" episode (1998) of the ''Secrets of WWII'' documentary series, and of the "Dead on Arrival" episode (2012) of the ''Secret War'' documentary series,
which both aired on the
Military Channel in the United States.
* ''Englandspiel'' is the historical inspiration for
"Elise" (2015), the last episode in Season 8 of the historical television drama ''
Foyle's War''.
* ''Special Operations: Wolf Squadron'', by Craig Simpson, follows dozens of teenaged Dutch agents being captured after parachuting into Holland due to the betrayal of a traitor in London, with a trio of Norwegian SOE operatives being sent to rescue the surviving Dutch agents after the ruse is discovered.
* The story is recounted in the ''
Encyclopedia Brown'' book, ''Encyclopedia Brown's Book of Wacky Spies,'' with an illustration showing agents parachuting into the arms of waiting German soldiers.
* ''Englandspiel'' is the inspiration for ''
The Silk Code'' a detective novel by Deborah Swift.
References
Notes
Footnotes
Further reading
*
* (translated by Arthur Barker)
*
*
*
* {{cite book , last=Marks , first=Leo, author-link=Leo Marks , title=
Between Silk and Cyanide: A Codemaker's Story 1941-1945, year=1998 , publisher=
HarperCollins
HarperCollins Publishers LLC is a British–American publishing company that is considered to be one of the "Big Five (publishers), Big Five" English-language publishers, along with Penguin Random House, Hachette Book Group USA, Hachette, Macmi ...
, isbn=0-684-86780-X
External links
Website about EnglandspielGuide to Englandspiel
World War II occupied territories
Netherlands in World War II
Abwehr operations
World War II espionage
Dutch resistance
Reich Security Main Office
Special Operations Executive