Cite

ALS to John Stevens Henslow, (1796-1861)

MLA

Upcott, William, 1779-1845. ALS to John Stevens Henslow, (1796-1861). Box 1. 1842 Sep 23. https://collections.library.yale.edu/catalog/15494510.

APA, 6th edition

Upcott, William, 1779-1845. (["Box 1"])(1842 Sep 23)[ALS to John Stevens Henslow, (1796-1861)]. https://collections.library.yale.edu/catalog/15494510.