Foreign Office Official Donald Maclean Spied for Moscow Since 1930s
By Constance Bell ·
A high-flying diplomat betrayed the British crown for twenty years before vanishing into the USSR, his double life preserved in the Security Service's files on Soviet agents.
The integrity of the Anglo-American alliance was compromised by a man who occupied the most sensitive corridors of British power. Diplomatic secrets meant to safeguard the West were instead delivered to the Kremlin by a trusted insider who viewed his colleagues as marks.
Donald Duart Maclean was not a peripheral clerk or a disgruntled low-level functionary. According to a catalogue entry from The National Archives (KV 2/4147), he was a "high flying employee of the Foreign Office." The public record shows he climbed the heights of the civil service with ease, serving as Third Secretary in Paris in 1938 and eventually ascending to the role of head of the American Department in the Foreign Office. He was the quintessential product of the British establishment, the kind of man whose social standing and pedigree acted as a shield against suspicion.
A Washington Leakage
That shield eventually cracked. The file's catalogue entry records that in 1951, Maclean was identified as the source of a "leakage from the Washington Embassy some years earlier." The entry does not specify the exact nature of the documents leaked, but the location is telling. While posted to Washington, Maclean sat at the intersection of British and American intelligence during the dawn of the Cold War, a position that granted him access to the very nerves of the Western security apparatus.
For the diplomats and intelligence officers who relied on the confidentiality of their cables, Maclean's betrayal was a systemic failure. He had been an asset to Soviet intelligence not since the 1951 discovery, but, as the Security Service assessed, since the 1930s. This means that throughout his rise—from Paris to London to Washington and Egypt—he was operating as a double agent. The man directing the American Department of the Foreign Office was, in reality, reporting to Moscow. The professional trajectory of his career was essentially a twenty-year exercise in infiltration.
Richard Curzon
Espionage of this duration requires more than just a willingness to betray; it requires a disciplined commitment to falsehood. The catalogue descriptions for KV 2/4147 and KV 2/4157 highlight a dizzying array of masks. Maclean did not simply lie about his activities; he operated under a series of aliases, including Richard Curzon, Mark Frazer, Percy Maclean, and S Madzoevsky.
This culture of deception extended to his domestic life. The records identify his wife, Melinda Goodlett Maclean, as an American and British national who shared in this shadow existence. The catalogue entry lists her under several aliases of her own: Melinda Marling, Melinda Philby, and Natasha Frazer. When a diplomat and his spouse operate under a rotation of false names, the deception is no longer a mere tactical necessity of the field—it is a lifestyle. It suggests a level of coordination with Soviet handlers that transformed a marriage into a cell.
May 1951
By 1951, the Security Service had closed in. But the establishment's instinct to protect its own, or perhaps a failure of nerve in the face of a high-ranking official's collapse, provided a window for escape. While under investigation, Maclean did not wait for a trial or a formal dismissal.
He vanished. Catalogue entries KV 2/4104 and KV 2/4117 record that Guy Francis De Moncy Burgess, another Soviet agent, disappeared from London in May 1951 along with Maclean. Burgess, who used aliases such as Roger Styles and Jim Andreyevich Eliot, had also been assessed as a Soviet agent since the 1930s. The two men, both entrenched in the British elite, fled together to the USSR, where Burgess later reappeared in Moscow.
Their flight was the final indignity for a Foreign Office that had allowed them to operate in the heart of its operations for decades. It confirmed that the leakage in Washington was not an isolated incident of indiscretion, but part of a wider, coordinated penetration of the British state by Soviet intelligence. The files indicate that Burgess and Maclean were not merely opportunistic spies but were integrated assets of a long-term strategy to blind the West.
These records are not listed among general diplomatic correspondence or personnel files. They are housed within the Security Service: Personal (PF Series) Files, specifically under the heading: SOVIET INTELLIGENCE AGENTS AND SUSPECTED AGENTS.