Donald Darling
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Donald Darling, code named Sunday (born ?, died 1 December 1977), was an agent for the clandestine British organizations
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 ...
and
MI9 MI9, the British Directorate of Military Intelligence Section 9, was a secret department of the War Office between 1939 and 1945. During World War II it had two principal tasks: assisting in the escape of Allied prisoners of war (POWs) held b ...
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 ...
. The purpose of MI9 was to help
prisoners of war A prisoner of war (POW) is a person held captive by a belligerent power during or immediately after an armed conflict. The earliest recorded usage of the phrase "prisoner of war" dates back to 1610. Belligerents hold prisoners of war for a ...
to escape and downed airmen and stranded soldiers to evade capture in German-occupied Europe and return to
Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
. Darling worked in
Lisbon Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...
and
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
. He financed and advised the escape and evasion lines which rescued soldiers and airmen and guided them to safety in neutral Portugal and Spain and British-owned Gibraltar. The escape lines rescued 7,000 soldiers and airmen in western Europe. Darling met and interviewed many of them on their arrival in Portugal and Gibraltar. As part of his work, Darling contributed intelligence to MI6 about conditions and events inside occupied Europe through knowing many of the key people involved in resistance and escape lines. As the allied forces reconquered Europe from
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 ...
, Darling was briefly in charge of the escape and evasion office (Room 900) of MI9 in London. From late 1944 to 1946, he headed the War Office and Foreign Office Awards Office in Paris, searching for missing persons who had worked with the escape lines, recognizing the contributions of escape line workers, and adjudicating claims for compensation.


Spanish Civil War

In 1939 and 1940, Darling worked for the
National Joint Committee for Spanish Relief The National Joint Committee for Spanish Relief (NJCSR) was a British voluntary association formed at the end of 1936, intended to co-ordinate relief efforts to the victims of the Spanish Civil War. The NJCSR was to act as an umbrella organization, ...
in Spain and France. He assisted refugees from the
Spanish Civil War The Spanish Civil War () was a military conflict fought from 1936 to 1939 between the Republican faction (Spanish Civil War), Republicans and the Nationalist faction (Spanish Civil War), Nationalists. Republicans were loyal to the Left-wing p ...
. His knowledge of the border region between France and Spain and his facility with
French French may refer to: * Something of, from, or related to France ** French language, which originated in France ** French people, a nation and ethnic group ** French cuisine, cooking traditions and practices Arts and media * The French (band), ...
and
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many countries in the Americas **Spanish cuisine **Spanish history **Spanish culture ...
was valuable in his later work with MI9. His involvement with left-wing
Republican Spain The Spanish Republic (), commonly known as the Second Spanish Republic (), was the form of democratic government in Spain from 1931 to 1939. The Republic was proclaimed on 14 April 1931 after the deposition of King Alfonso XIII. It was dissol ...
made him anathema in
Francoist Spain Francoist Spain (), also known as the Francoist dictatorship (), or Nationalist Spain () was the period of Spanish history between 1936 and 1975, when Francisco Franco ruled Spain after the Spanish Civil War with the title . After his death i ...
. Spain remained neutral during World War II, but leaned toward Germany. Prime Minister Churchill's instructions to British Ambassador to Spain, Samuel Hoare, were to "keep Spain neutral." Hoare was leery of any British action that might push the Franco government closer to Nazi Germany. Because of Hoare's opposition, Darling was unable to base himself in Spain during World War II.


World War II

Darling was in France as an agent of the Secret Intelligence Service
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 ...
when France was defeated by Nazi Germany in June 1940. He escaped to England. At this time, Darling was described by
Airey Neave Lieutenant Colonel Airey Middleton Sheffield Neave, () (23 January 1916 – 30 March 1979) was a British soldier, lawyer and Member of Parliament (MP) from 1953 until his assassination in 1979. During the Second World War he was the first ...
of MI9 as 'dark-haired and well -built" with "a remarkable memory for faces and names" and a "witty and ingenious" correspondent. In mid-July 1940, Darling met in London with
Claude Dansey Lieutenant-Colonel Sir Claude Edward Marjoribanks Dansey, KCMG (10 September 1876 – 11 June 1947), also known as Colonel Z, Haywood, Uncle Claude, and codenamed Z, was the assistant chief of the Secret Intelligence Service known as ACSS, of ...
, deputy chief of MI6 and influential in the fledgling MI9. Dansey asked Darling to organize a clandestine escape route for MI9 out of France into Spain and Portugal for allied airmen and soldiers. He said that British Ambassador
Walford Selby Sir Walford Harmood Montague Selby (19 May 1881 – 7 August 1965) was a British civil servant and diplomat. Career Selby was educated at Charterhouse School and Christ Church, Oxford, and joined the Diplomatic Service in 1904 as an attaché. ...
in Portugal was willing to support Darling in his mission. Two days later, Darling was in
Lisbon Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...
. His cover in the Embassy was as the
Vice Consul A consul is an official representative of a government who resides in a foreign country to assist and protect citizens of the consul's country, and to promote and facilitate commercial and diplomatic relations between the two countries. A consu ...
for repatriation and he was given the code name "Sunday." Darling's mission was secret and he was not popular with the females in the Embassy who considered him "a dashing young fellow with a sports car" who was "doing something with Red Cross parcels when he should be in the ilitaryforces." In Lisbon, Darling met with MI6 agent
Nubar Gulbenkian Nubar Sarkis Gulbenkian (; 2 June 1896 – 10 January 1972) was an Armenians, Armenian-British people, British business magnate and Playboy (lifestyle), socialite born in the Ottoman Empire, Ottoman empire. During World War II, he helped organ ...
, a wealthy British-Armenian businessman, resident in
Vichy France Vichy France (; 10 July 1940 – 9 August 1944), officially the French State ('), was a French rump state headed by Marshal Philippe Pétain during World War II, established as a result of the French capitulation after the Battle of France, ...
, the unoccupied part of France. Gulbenkian agreed to return to Vichy and establish contacts to set up the escape line. Through Gulbenkian, Darling became aware of the
Pat O'Leary Line The Pat O'Leary Line (also known as the Pat Line, the O'Leary Line, and the PAO Line) was a resistance organization in France during the Second World War. The Pat O'Leary escape line helped Allied soldiers and airmen stranded or shot down ov ...
, based in
Marseille Marseille (; ; see #Name, below) is a city in southern France, the Prefectures in France, prefecture of the Departments of France, department of Bouches-du-Rhône and of the Provence-Alpes-Côte d'Azur Regions of France, region. Situated in the ...
, headed at that time by
Ian Garrow Lieutenant-Colonel Ian Grant Garrow DSO (24 August 1908 - 28 March 1976) was a British army officer with the Highland Light Infantry. He was the founder of the Pat O'Leary Line in Marseilles which helped Allied soldiers and airmen escape Nazi ...
and dedicated to helping British soldiers stranded in France after the
Dunkirk evacuation The Dunkirk evacuation, codenamed Operation Dynamo and also known as the Miracle of Dunkirk, or just Dunkirk, was the evacuation of more than 338,000 Allied soldiers during the Second World War from the beaches and harbour of Dunkirk, in the ...
escape to Spain. Gulbenkian arranged for payment by MI9 to guides who would smuggle escaping soldiers across the
Pyrenees The Pyrenees are a mountain range straddling the border of France and Spain. They extend nearly from their union with the Cantabrian Mountains to Cap de Creus on the Mediterranean coast, reaching a maximum elevation of at the peak of Aneto. ...
from France to Spain. During the war, the Pat line smuggled more than 600 allied soldiers and airmen and a large number of other people wishing to escape the Nazis out of France.


The Comet Line

In August 1941, a young Belgian woman named
Andrée de Jongh Countess Andrée Eugénie Adrienne de Jongh (30 November 1916 – 13 October 2007), called Dédée and Postman, was a member of the Belgian Resistance during the Second World War. She organised and led the Comet Line (''Le Réseau Comète'') ...
appeared unannounced at the British consulate in
Bilbao Bilbao is a city in northern Spain, the largest city in the Provinces of Spain, province of Biscay and in the Basque Country (greater region), Basque Country as a whole. It is also the largest city proper in northern Spain. Bilbao is the List o ...
with a British airmen and two Belgian soldiers. She had guided them from Belgium, through France, to Spain and said she could rescue more British airmen if the British paid the
Comet Line The Comet Line (; 1941–1944) was a Resistance organization in occupied Belgium and France in the Second World War. The Comet Line helped Allied soldiers and airmen shot down over occupied Belgium evade capture by Germans and return to Great ...
's expenses. The diplomats in Spain and Dansey of MI6 in London were skeptical of de Jongh, fearing she might be a German agent, but Darling had heard of her through his contacts. He said it was unlikely that she was a German agent and that the men she had smuggled into Spain were "full of admiration for her." MI6 agreed to finance the Comet Line. Darling gave de Jongh the code name "Postman" and her organization became one of the most successful escape lines operating in Europe.


Harold Cole

In late 1941, the escape lines were infiltrated by German agents and decimated by German arrests of their leadership and workers. A British soldier,
Harold Cole Harold Cole (24 January 1906 – 8 January 1946), also known as Harry Cole, Paul Cole, and many other aliases, was a petty criminal, a confidence man, a British soldier, an operative of the Pat O'Leary escape line, and an agent of Nazi German ...
, described by a
Scotland Yard Scotland Yard (officially New Scotland Yard) is the headquarters of the Metropolitan Police, the territorial police force responsible for policing Greater London's London boroughs, 32 boroughs. Its name derives from the location of the original ...
detective as the "worst traitor of the war," was one of the infiltrators. In December 1941, acting on Cole's information, the Germans captured many of the Pat lines operatives.
Albert Guérisse Major General Count Albert-Marie Edmond Guérisse (5 April 1911 – 26 March 1989) was a Belgian Resistance member who organized French and Belgian escape routes for downed Allied pilots during World War II under the alias of Patrick Albert ...
(also known as Pat O'Leary), head of the Pat Line, informed Darling that he was going to kill Cole. Darling dutifully informed Dansey in London of Guérisse's decision, but Dansey objected. Dansey's opposition to killing Cole has aroused speculation that Cole was a double agent, working for MI6 as well as the Germans, and that Dansey was willing to sacrifice MI9 to protect Cole. Darling disagreed with Dansey and in April 1942, he convened a meeting in
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
with Guérisse and
James Langley Lieutenant-Colonel James Maydon Langley (12 March 1916 – 10 April 1983) was an officer in the British Army, who served during World War II. Wounded and captured at the battle of Dunkirk in mid-1940, he later returned to Britain and served in ...
, a leader of MI9, to discuss killing Cole. However, before Cole's assassination could be accomplished, he was arrested by the Germans for double-crossing the German intelligence agency, 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 ...
. In 1945, Darling identified Cole, freed by the Germans, from a photograph of him masquerading as an American undercover agent. Cole was arrested, but escaped and would later be killed by French police.


Gibraltar

Darling moved to British-owned
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
on 5 January 1942. Gibraltar became the main destination of downed allied airmen escaping occupied Europe. Numbers of downed airmen were increasing, soon to include Americans as well as British subjects. British diplomat Michael Creswell had the job of moving evaders through Spain to Gibraltar. Darling's main objective in Gibraltar was to arrange for the evacuation of evaders either by air or sea to England. On arrival, he found a backlog of downed airmen awaiting evacuation. In April 1942, he assisted in implementing a plan to pick up evaders by British naval vessels disguised as fishing boats. More than 100 airmen were rescued by the vessels in 1942. Allied armies invaded German-occupied North Africa on 8 November 1942. On 18 November, Darling asked MI9 to tell the allied forces not to attack a camp in
Tunisia Tunisia, officially the Republic of Tunisia, is a country in the Maghreb region of North Africa. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia also shares m ...
which he had learned held 110 British POWs and 100 Spanish refugees In Gibraltar, Darling interviewed evaders, verified their identities, and collected information from them which he passed along to MI9 in London. From his interviews, he acquired a detailed knowledge of the escape lines and their workers – so much so that his files were kept in weighted sacks to be sunk into the sea if Germany invaded Gibraltar.


London and Paris

In March 1944, Darling was ordered back to London where he took over the evasion section (Room 900) of MI9 replacing
Airey Neave Lieutenant Colonel Airey Middleton Sheffield Neave, () (23 January 1916 – 30 March 1979) was a British soldier, lawyer and Member of Parliament (MP) from 1953 until his assassination in 1979. During the Second World War he was the first ...
who departed to seek out survivors of the escape networks after the
D-Day invasion The Normandy landings were the landing operations and associated airborne operations on 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during the Second World War. Codenamed Operation Neptune and often referred to as D ...
of France on 6 June 1944. In September 1944, Darling journeyed to Paris where he headed the War Office and Foreign Office Awards Office headquartered in the Grande Hotel Palais Royal. Eventually he would have a staff of 65 persons dedicated to finding the many missing workers of the escape lines and recommending awards and compensation for services contributed by the people who had worked on the escape lines. MI6 gave him the military rank of major. By the time the office closed on 31 July 1946, 112,570 cases and claims for compensation were adjudicated. The cases included investigation of Nazi collaborators, paternity claims, locating lost airmen and soldiers, and identifying those people who had helped evaders. About 7,000 airmen and soldiers, mostly British and American, were helped by the escape lines to evade German capture in Western Europe (mainly France, Belgium, and the Netherlands) and successfully returned to the United Kingdom during World War II. A large number of other people opposing the Nazis were also helped to escape. One estimate of the number of people who worked on escape lines is 12,000 of whom more than 500 were executed or died in concentration camps. Emaciated survivors of concentration camps, such as Andrée de Jongh and Albert Guérisse, visited the Awards Office.


After the war

In 1946, MI6 transferred Darling to Germany where he investigated the "rat lines" -- the escape routes that helped Nazis escape Germany at the end of the war and relocate to South America and other places. In 1947, he was sent to Brazil to work for the British Central Office of Information. Darling wrote two books about his WW II experiences: ''Secret Sunday'' published in 1975 and ''Sunday at Large: Assignments of a Secret Agent'' published in 1977.


References

{{DEFAULTSORT:Darling, Donald 1977 deaths 20th-century spies MI6 personnel World War II spies for the United Kingdom Escapes and rescues during World War II Spain in World War II Portugal in World War II Gibraltar in World War II British people of the Spanish Civil War Year of birth missing