Sir John Alexander Sinclair, was a British Army general who was head of the Secret Intelligence Service from 1953 to 1956.
Sinclair in 1944
Stewart Menzies
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Major-General Sir Stewart Graham Menzies was Chief of MI6, the British Secret Intelligence Service, from 1939 to 1952, during and after the Second World War.
John Sinclair (British Army officer)
…Major-General Sir John Sinclair Sinclair in 1944 4th Chief of the Secret Intelligence Service In office 1953–1956 Preceded by Stewart Menzies Succeeded by Dick White Director of Military Intelligence In office 1944–1945 Preceded by Francis Davidson Succeeded by Freddie de Guingand Personal…
Keith and Stewart Menzies, the two eldest sons of Lady Susannah Holford, pictured here in 1914
VE letter by S. Menzies to GC&CS