19. x. 1958. Dear Joshua, thanks for your letter and the plan of Madison. I'm afraid I have to disappoint you on the accuracy of your notes: the harsh truth is that we are to leave Chicago at 4 p.m., Nov. 21, and should be in Madison 5 minutes earlier, at 355. (This has something to do with Galileo, but I haven't quite worked out the connection yet.) According to Carnegie's schedule we would be infesting your neighbourhood till early morning of 29th. However, I'll have to do a side-trip to Milwaukee, probably 25 and 26th, and would spend some time with Duard[?] Walker who has recently done some interesting experiments but doesn't know yet what they mean. Frank Fenner has specifically asked me to get your advice on some problems of virus genetics and on the organization and staffing of a department centered round these problems, and I have some preliminary results which may lead to something like an end-group analysis of antigenic surfaces -- this is the question I'd like to discuss with you in detail. I would be grateful if you could make reservations for us somewhere on or near the campus (the us is not my usual royal plural, Joyce is coming too). I hope to see Talmage in Chicago, even though I shall miss him in Madison. All the best to both of you, Yours, Stephen.