The Bond of Black by William Le Queux

Scarcely had we concluded our conversation when the police arrived, and removed the body to the mortuary, in order that the doctor might make his examination; then, there being nothing to detain me further in the dead man's chambers, I left in company with the detective, the latter having given Ash orders not to disturb a single thing in the rooms. If it were proved that the member for South-West Sussex had actually been murdered, then another examination of the place would have to be made.

The more I reflected upon the puzzling circumstances, the more bewildering they became.