Correspondence
Letter from Italy during World War II
Letter describing his responsibilities in Europe during World War II
Letter from Germany after World War II
Letter describing his responsibilities at the University of Texas
Letter describing his summer work with Fundulus at Salisbury Cove
Letter about his leave of absence and requesting details on Hamburger's developmental genetics course
Suggestion of people to write recommendation letter for the Sloan Research Fellowship.
Discussions about differences of NGF in developing chick embryos and in sarcomas
Updates about plans to visit the US.
Handwritten letter, 2 pages
Request to arrange Jean Wiame's visit
Updates: Brachet's lab was shut by the Nazis; The book project was the only thing left that he could do; Going to the US from May to June.