On Tuesday, October 4, the Harvard Business School entertained as its guest Mr. H. Gordon Selfridge, the first man to introduce American department store methods into England. Mr. Selfridge has just deposited with the Business School Library a part of his collection of the original account books of a branch of the Medici family, covering the period from 1377 to 1597. He is a member of The Business Historical Society, and long before its foundation he was carrying on the sort of research that is the principal object of this organization. His interest is in the biographies of famous business men of the past, the Fuggers and the Medici in particular.