- Article “The Case for Federal Union” by Vernon Nash from The Christian Century. [Filed under AHP: Federal Union, Inc: Box # 5.004, Folder 4.5]
- Lecture: “The Search for Direct Methods of Determining the Structure of Molecules and Crystals from Diffraction Data” at Columbia University.
- Letter from Dr. J.G. Kirkwood, Acting Chair, Department of Chemistry, Cornell University, RE: Clarifies Prof. Papish's understanding of the agreement concerning Hughes. States that they agreed that Hughes was to be given work at Caltech and that they would offer him a position if one became available, but not guarantee a position. (Note in left margin and under text re: draft of letter from LP to Papish concerning their agreement regarding Hughes. Reminds Papish that Hughes was given the appointment at Caltech at his suggestion for a period of two years, at the end of which he was promised a position at Cornell. Adds that AHP corroborates this information as she was present when the defining conversation occurred.) [Letters from Kirkwood to LP April 4, 1940, from LP to Kirkwood May 16, 1940] [Filed under LP Correspondence: Box #198.12 file:(Kirkwood, John G.)]
- Letter from Walter Rautenstrauch, American Friends of the Chinese People, to LP RE: Describes the difficulties the Chinese people are facing in their resistance against the Japanese and proposes the induction of a China Technical Aid Committee. Ask LP to be a sponsor to this committee. [Letter from LP to Walter Rautenstrauch May 14, 1940] [Filed under LP Correspondence: #340.5]
- Writes cheque to "Commodore Hotel," $31.60. [Filed under LP Biographical: Business and Financial, Box 4.015, Folder 3]