Closing last two lines of an A.L.S., with sentiment and full signature

New York. framed. very good. Closing last two lines of an A.L.S. , with sentiment and full signature, 4 1/2" X 2 1/4", c, 1880's in full: "Your number is 81 Warren Street, New York - Your's truly - Horatio Alger [Jr,]" Irregularly cut top margin not affecting text. Framed with book cover of "Marks Mason's Triumph".

Prolific 19th-century American author best known for his novels characterized by a rags-to-riches narrative.