7th January, 1964.
Dear Alex,
Thank you for your letter of 4th January.  I have noted what you say about the William T. Sedgwick Memorial Lecture.  The title is perfectly satisfactory.  I also note that there is a dinner attached to it.
About social arrangements, I wrote to Jim yesterday about another matter and as I had not heard from you I suggested that he should coordinate the various invitations.  I am willing to fall in with any reasonable arrangements you make between you.  On your specific questions, I think it would be easier for everyone if I stayed at an hotel (I asked Jim to find me one).  I would certainly like to come to Walter Rosenblith's party on the Saturday evening.
It would be nice to have the direction of messenger reading cleared up.  Sydney and the others are working hard trying to discover the codon for the amber and ochre mutants.  We have a good idea what they are and perhaps by the time I reach M.I.T. we shall know rather more definitely.
F. H. C. Crick