While not much is known about the early life of Edward Mallen, he is remembered as an artist and frequenter of Pfaff's. William Winter identifies "Edward F. Mullen" as one of the artists who frequented Pfaff’s Cave along with Launt Thompson, George Boughton, and Sol Eytinge, Jr. (Old Friends 66, 88). Walt Whitman, a close friend of his, is also quoted as saying that "Mullin" was "among the leaders" at Pfaff’s (Bohan 134; T. Donaldson 208-209).