Comprises: Folder 1: 'Jon's Serum + Mono Clonal Correspondence'. Template letters sent out with sera samples, c.1992 Folder 2: Correspondence mainly with Ray Cartwright, Leukaemia Research Fund, Leeds. Relates to tests carried out on testis cancer patients, familial leukaemia, studies on Hodgkins patients and shipments of family samples, 1983-1988 ( =Res.) Folder 3: 'MAD…