Benjamin Franklin (1840). “The Works of Benjamin Franklin; Containing Several Political and Historical Tracts Not Included in Any Former Edition, and Many Letters, Official and Private, Not Hitherto Published; with Notes and a Life of the Author”, p.305
Eliza Bisbee Duffey (1877). “The Ladies' and Gentlemen's Etiquette: A Complete Manual of the Manners and Dress of American Society. Containing Forms of Letters, Invitations, Acceptances and Regrets. With a Copious Index”