Text
Typewritten letter, 1 page
Handwritten letter, 3 pages
Congratulations to Hamburger's Presidential Science Medal; Excitement about reading Haeckel and Weismann.
Typewritten letter, 1 page
Handwritten postcard
Discussion about whether Ernst Haeckel was a materialist or idealist; updates on the Birkhauser collection.
Letter about Carson's work with Drosophila
On his difficulties to write papers in English. Thank-you note for reprints.
Letter about Hamburger's article on Cajal and Harrison
Letter from Hawaii about Carson's election to the academy [National Academy of Sciences?]
On their book manuscript and the chapter on cell behaviour.
Typewritten letter, 3 pages, signed 'Wally'