Correspondence
Typewritten letter, 1 page, signed 'Wally'
Typewritten letter, 2 pages, signed 'Wally'
Handwritten letter, 4 pages, signed 'Wally'
Handwritten letter, 2 pages, signed 'Wally'
Typewritten letter, 1 page
Typewritten letter, 1 page
Next year is fine for visit
On Holtfreter's paper on self-organization.
Review of Waddington's "Principles of Embryology".
On Hamburger's lectures in Woods Hole. On Joan Anderson's work on the morphogentetic fraction of phosphatides.
Letter dated May 8 with no year.