Summer on the Lakes, in 1843
“That noblest and loveliest of modern Preux, Lord Edward Fitzgerald, who came through Buffalo to Detroit and Mackinaw, with Brant, and was adopted into the Bear tribe by the name of Eghnidal, was struck, in the same way, by the delicacy of manners in the women.”
Fuller, Margaret. Summer on the Lakes, in 1843. Boston: Little, Brown & Co., 1844.
Inferred Fuller names Lord Edward Fitzgerald explicitly and quotes from his letters. Fuller quotes directly from Fitzgerald's words as published in Moore's biography.