Jan. 11, 1951 Dear Joshua-- I have to go up to [ . . . ] on family affairs, and will accordingly plan to visit Madison en route from Seattle. Tentatively, I will get to Portage, [ . . . ] on the Hiawatha at 10:50 AM on Tues Jan. 30. I take it that there is a good bus service from there to Madison. How about scheduling the seminar for the next day? The title would be "The bacterial oxidation of tryptophian: a comparative study". Please let me know as soon as possible if this is O.K. Mike has some data on the coli mutants that I want to tell you about, so remind me. Best wishes, Roger P.S. Tell Quin I expect him to cook a dinner for me.