Correspondence and minutes relating to the Whitehall Study Correspondence, meeting minutes, memoranda, manuscript notes principally relating to the Whitehall Study health survey, including: material relating to the tracing of Whitehall and General Post Office cohort through Southport office of the General Registry Office; collection of sickness absence records from all departments, including meetings minutes with Treasury Medical Service to discuss the procedure and manuscript notes by Patrick Hamilton on microfilming GPO sickness cards. 1969-1975