Recollections of a very junior physicist at Los~Alamos, 1944-1946

The author came to Los Alamos as a member of the~British Mission after two years of making fission cross section measurements at the~Cavendish Laboratory. He worked in a group headed by Egon Bretscher in Enrico Fermi's F~Division. The talk presents his personal memories and experiences at Los Alamos as~compared to his life and work in wartime Britain.