Jacques Monod, André Michel Lwoff, Boris Ephrussi and one other unidentified person sitting on a porch of a house at Cold Spring Harbor, 1946

André Michel Lwoff, Jacques Monod, Boris Ephrussi and Harriett Taylor on the porch of a house at Cold Harbor, 1946

Photographs of Pontecorvo giving lectures and receiving honorary degrees as well as others of his friends and colleagues

Photographs of friends and colleagues at Cold Spring Harbor, 1946 and of attendees of the 2nd Microbial Genetics Conference in Palanza, 1952

Photographs of the 100th Genetical Society meeting in Cambridge on 30 June 1949 and of staff at the Institute of Animal Genetics at the University of Edinburgh

Correspondence chiefly about research topics