Cite

a. The Author's Syndicate, signed by Margaret Sanders.

MLA

Eliot, George, 1819-1880. a. The Author's Syndicate, signed by Margaret Sanders.. Box 57. 1928 Jan 30. https://collections.library.yale.edu/catalog/10001638.

APA, 6th edition

Eliot, George, 1819-1880. (["Box 57"])(1928 Jan 30)[a. The Author's Syndicate, signed by Margaret Sanders.]. https://collections.library.yale.edu/catalog/10001638.