R.J. Mitchell discovered NGC 2688 on 11 Mar 1858 using Lord Rosse's 72" (along with NGC 2686, 2687 and 2689), while observing the field of NGC 2684. He simply noted "vvF" but the sketch can be matched up well with MCG +08-16-040 = PGC 25048. See Corwin's identification notes.
400/500mm - 17.5" (3/8/97): not found
Notes by Steve Gottlieb