4pp ads preceding front., illus, text in two columns; some marking to text, especially pp 84-85. Orig. purple-brown cloth; a few small discreet repairs, cloth sl. lifting in places, a little marked. First published in All the Year Round, 1859-60, then as a three-decker. This is the first U.S. book edition, having previously been published in Harper's Weekly, with the illustrations by John McLenan. Collins's great mystery-sensation novel - and one of the earliest detective stories.