THE ROCKEFELLER INSTITUTE FOR MEDICAL RESEARCH 66TH STREET AND AVENUE A NEW YORK March 31, 1924. Dear Dr. Sabin: I have your very gratifying letter of March 24 and I will present it, together with an outline of the plans we have discussed together, at the meeting of the Board of Scientific Di- rectors of the Rockefeller Institute which comes on April 26 (not the 19th as I thought). I shall be able to write you immediately after that meeting, telling you how the plans are received by our Board. I feel that there is an excellent chance of getting for- ward with the diseases of the blood-forming organs. I am pleased also with the possibility of Dr. Cun- ningham being interested in the plans to the extent that he would consider becoming part of the working group in Rew York. From what you have told me, I do not feel that Dr. Doan is so essential. If he craves clinical work imediately, I should hardly feel like persuading him to defer. But you under- stand this situation far better than I do. I cannot but believe, howerer, that you and Dr. Cunningham would soon train tither young man with clinical interests to help as Dr. Doan is now do- ing. If Dr. Doan would like to talk over plans with me (possibly also with Dr. Cole) after the Board meeting to which I referred, I should be happy to talk with him. I may be coming to Baltimore within a week or two, and could talk with him then. .I need not say that I should feel it a great thing to have you at the Rockefeller Institute. With warm regards, Yours sincerely, P.S. Thank you very much for the photograph of the draw- ing of Dr. Mall. Dr. Florence R. Sabin, Dept. of Anatomy, Johns Hopkins Medical School, Baltimore, h4d.