189 West llth Ave Columbus 10, Chio July 24, 1949 Dr. Joshua Lederberg Dept. of Genetics University of Wisconsin Madison 6, Wisconsin Dear Dr. Lederberg: Thank you for reserving a room for me at the Union, I now plan to leave Columbus on the evening of July 31, and to arrive in Madison at 12:45 P M Central Standard Time, The time-table was very halpful, A { When I suggested experimenting with meningococci I had in ‘aind just isodating some biochemical mutants by the technic you have used with E.coli, but perhaps even that would take more than a week. I have a lyophilized sample of virulent meningo- cocci with me, but shall not be disappointed if we don't use them. The agenda you list sounds very satisfactory, and I know I'll profit from the fisit no matter what organisms I work with. Sincerely yours, en ee