MLA

Marsh, Othniel Charles, 1831-1899. Watson, Edward. Box 34, folder 1463. 1887. https://collections.library.yale.edu/catalog/32569920.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 34, folder 1463"])(1887)[Watson, Edward]. https://collections.library.yale.edu/catalog/32569920.