INSTITUTIONEN FOR CELLFORSKNING ', MEDICINSKA NOBELINSTITUTET , KAROLINSKA INSTITUTET STOCKHOLM 60 Stockholm, January 13, 1961. Telefon 23 54 80 INSTITUTE FOR CELL RESEARCH KAROLINSKA INSTITUTET STOCKHOLM 60 Professor Joshua Lederberg Stanford University Medical Center Palo Alto, California Dear Professor Lederberg: Coming back to our discussion in San Fransisco and our » earlier correspondence I wonder whether it would suit you if I came to Stanford for a period of one week some time in the middle of February, for instance February 13-18. In such case I could combine the trip with a Washington-visit in the latter part of February. We have just started measurements on bacteria and I have secured the means for a man to work half time on that project from a research council here. I think it would be better if we had the discussion we spoke about last summer now, when the measurements are beginning rather than later on and this is the reason for this letter. If the time should not suit you please do not hesitate to say so. Very sincerely yours QQ DS Cee eam Torbjérn Caspersson TC:la