My brother, Richard Abraham, who has died aged 82, was an author of books about key figures in the Russian revolution, a history teacher for 40 years and a dedicated choir member.
From 1969 to 1971, Richard was a tutorial assistant in Russian history, and a member of the faculty board of the School of European Studies, at the University of East Anglia, where he taught Russian history, 1682-1921. He also made research visits to places such as Helsinki, Paris and New York.
