MLA

Marsh, Othniel Charles, 1831-1899. Henry, Michael. Box 16, folder 647. 1886. https://collections.library.yale.edu/catalog/32560379.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 16, folder 647"])(1886)[Henry, Michael]. https://collections.library.yale.edu/catalog/32560379.