Letter from Dr. Maycock to Dr. J. J. A. Reid, copying Dr.Walters, Mr. Gidden and Dr. [illegible], re the supply of the various preparations of antihaemophilic globulin and Factor IX for treating patients with haemophilia and allied disorder. Letter from W. dA. Maycock to Dr. I. S. Macdonald, SHHD, re an expert committee meeting on the supply of therapeutic materials in relation to the treatment of haemophilia and allied disorders.