Recollection of the work done on semiconductors at Purdue University after World War II. Major topics include Fan's education at Massachusetts Institute of Technology, his recollections of the Purdue physics department in the 1940s, and work on semiconductors at Purdue in the 1940s. Also prominently mentioned are: Ralph Bray, Karl Lark-Horovitz, A. H. Wilson; Lawrence Radiation Laboratory, and Massachusetts Institute of Technology Radiation Laboratory.