Letter from David Linn Edsall, Harvard University Medical School, Boston 17, Massachusetts, to Joseph Barcroft, King's College, Cambridge University, England Thanking Barcroft for his letters. He has had various conversations with Redfield, Bock and Lawrence Henderson. Arangements have been made to take the American party on the Grace Line from New York to Callao. Mr. Jerome Green suggests making return plans in concert with the Pacific Steam Navigation Company, although Edsall cites legal concerns. He has not yet heard from the General Electric Company about borrowing a portable x-ray apparatus. 29 September 1921