April 27, 1929. Dear Doctor Anderson: Will you check over this chart very carefully and see if I have all the solubilities correct? Is it correct to use the term "Glycerides" as the fourth lipoidal substance? If so, it will simplify our chart very much. I am getting this ready for the final publications and am very anxious to have everything straight. Can you send us 250 mgms. of your polysaccharide? We decided that in order to have the paper entirely complete, we should give 12 intraperitoneal doses to be quite sure of the amount of new tissue produced. So far we have only given three intraperitoneal doses. If you can let us have this, we will be very grateful. All I can say is that the ways of newspapers are peculiar. I trust you were not too much disturbed over the headline about the fatty acid as our discovery. Where the papers got the idea of the relation of this work to tumor formation is beyond my conception. Very cordially yours, Florence R. Sabin.