| Description Of Item | Letter from Chalmers on the tuberculosis conference at the Royal College of Physicians, London, asking Crofton to contribute a biographical piece on Reg Bignall's contribution to TB research and enclosing Crofton's letter to John Bignall on his father's work; and letter from Crofton on the early controlled trials and a paper titled 'Early Controlled Trials and London (now Royal) Postgraduate School of Medicine'. |