Captain in the 13th New York Cavalry Volunteers in the Civil War. Papers consist of an envelope written on both sides in 1912 by Revell referring to passages in Memorial of Henry Sanford Gansevoort (1882), by J.C. Hadley, about Confederate ranger Colonel John Singleton Mosby's wounding and capture in December 1864, at which he was present. With the manuscript is a copy of the book, inscribed by Revell and Gansevoort's sister, Catherine Lansing.