London: Edmund Fry and Son, 1836. First U.K. Edition. Biography of the Quaker prison reformer and philanthropist who made his fortune in New York in the insurance business before overseeing the establishment of a new penitentiary system. First published in New York in 1834, seven years following Knapp's death. SABIN 38080. Octavo (21.5cm.); publisher's tan blind-embossed cloth, gilt-lettered spine, yellow glazed endpapers; 264pp.; engraved portrait frontispiece. Ex-Friends' Library with their contemporary label to upper cover and internal ex libris and rubberstamp, corners bumped, cloth rather dust-soiled and rear cover darkened along margins, dampstain to bottom gutter edge of frontispiece slightly affecting pastedown, else a Good or better copy.