Correspondence and Personal Material: includes a letter from Halsey Cooper to his mother on his 57th birthday and his suicide note;, Dec. 1, 1885-Dec. 12, 1885

Correspondence and Personal Material: includes a letter from Halsey Cooper to his mother on his 57th birthday and his suicide note;, Dec. 1, 1885-Dec. 12, 1885, Box: 3, Folder: 39. Sarah Brown Ingersoll Cooper papers, 6543. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/522686 Accessed January 23, 2026.