An interim listing of John Murray's H.M.S. Challenger Sediment Collection. This is intended to accompany a forthcoming publication on that collection. Some parts are incomplete (some georeferencing is still required for non-station numbered sites and some of the related slides are still to be added to the list). The dataset includes details of original sediment, prepared sediment (sieved residues, chemical preparations), related slides, geological specimens (polymetallic nodules, pumice etc), biological specimens (sharks and other vertebrates, whales, foraminifera) as well as details of how they were collected and prepared.