MLA

Scott, Walter, 1771-1832. AL to Miss Hayman, Edinburgh. Box 1, folder 15. [1807] Nov 10. https://collections.library.yale.edu/catalog/2054610.

APA, 6th edition

Scott, Walter, 1771-1832. (["Box 1, folder 15"])([1807] Nov 10)[AL to Miss Hayman, Edinburgh]. https://collections.library.yale.edu/catalog/2054610.