Correspondence and Personal Material: includes a letter from William Sheldon which addresses the national and international influences of Sarah's Kindergarten work;, Apr. 1890-May 1890

Correspondence and Personal Material: includes a letter from William Sheldon which addresses the national and international influences of Sarah's Kindergarten work;, Apr. 1890-May 1890, Box: 4, Folder: 24. Sarah Brown Ingersoll Cooper papers, 6543. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/522712 Accessed January 19, 2026.