December 14, 1936

Mr. John Story Jenks,
         123 South Broad Street,
                    Philadelphia, Pennsylvania.

Dear Mr. Jenks:

          On the evening of your Wistar Party I am due in Paris to keep an engagement intimately bound up with the work of the Foundation.  More than ten years ago I saw that if I was going to solve the problem I began with, I would have to ban social engagements of all kinds and stick to my purpose.  I know that in doing that I have lost much pleasure and benefit, even though I have found considerable compensation in the work which made such sacrifices necessary.