He studied first at the University of London beginning in 1913, and earned a B.Sc. and subsequently took the occupation of schoolteacher. He served as a captain in World War I, after which he spent the 1920s at the London School of Economics writing a thesis about the West African slave-trade, but he did not complete his M.Sc. degree.
He married Marjorie Constance Mason on 4 August 1928 at St. Mary's parish church at Finchley in London. Their divorce was finalized on 7 February 1938. They had no children.
He next married Mabel (nee Eaton), the widow of Leonard Harry Vardon, on 29 April 1943. She was about 50 at the time of their marriage.
He worked as a lecturer in Economics. He joined the British Society of Russian Philately in 1937 and went on to serve as their president.
He died at home of a heart attack, while suffering from stomach cancer. During life, he always spelled his middle name "Maslen," but it says "Maslin" on his tombstone.
Mabel Eaton Vardon Chamberlain
1891–1974 (m. 1943)