Thank you letter to John D. Rockefeller, Jr.–name misspelled–by a Florida physician who took a course to learn about diabetes and insulin administration, funded by the 1923 “Insulin Gift.”
Joseph Halton to John D. Rockefeller, Jr., October 20, 1923. Folder 457, Box 46, Series III 20, FA 324. Office of the Messrs. Rockefeller records, Rockefeller Archive Center.