He was Secretary of
Cambridge University Press from 1922 to 1948, Master of
Pembroke College, Cambridge from 1948 to 1958, Vice-Chancellor of
University of Cambridge from 1949 to 1951, and Chairman of the
British Film Institute from 1952 to 1956. He was an author, publisher and biographer and a noted Sherlockian, being president of the
Sherlock Holmes Society of London. According to Jon Lellenberg, Roberts is responsible for the popularisation of the
Sherlockian game of criticism. In 1954 he held the
Sandars Readership in Bibliography and his topic was "The evolution of Cambridge publishing. He was knighted in 1958. The
National Portrait Gallery holds three photographic portraits of Roberts by
Elliott & Fry, made in 1949. ==Personal life==