MLA

Hawthorne, Nathaniel, 1804-1864. Fowler, William. Box 2, folder 82. 1851 Mar 16. https://collections.library.yale.edu/catalog/2064597.

APA, 6th edition

Hawthorne, Nathaniel, 1804-1864. (["Box 2, folder 82"])(1851 Mar 16)[Fowler, William]. https://collections.library.yale.edu/catalog/2064597.