Letter from Dr Kirk to Dr Raper re Nicholas Sainsbury. Kirk notes that Raper had made Kryobulin available for treatment of Nicholas as part of hepatitis study but he had several severe reactions to it. Kirk is transferring those boys who reacted to Kryobulin to Hemofil. He asks Raper if Nicholas can receive Hemofil or if not that he be restricted to Cryoprecipitate.