Correspondence
Typewritten letter, 1 page
Handwritten letter, 2 pages
Updates on Bertalanffy's arrival in St. Louis
Original in poor condition
Handwritten letter, 2 pages
Original in poor condition
Original in poor condition
Difficult to read; creator name uncertain
Discussion of the story of Rubezahl, a folklore mountain spirit. Includes envelope that gives exact postage date.
Bid to be the publisher for Hamburger's upcoming biography on Hans Spemann
Updates on scientific pursuits and personal life.