potter

First, there are two seemingly unrelated events: the murder of a constable in pursuit of a diamond thief and the attempt to poison a potter by using arsenic. The connection lies in the presence of Dr. Oldfield, a Dr. Thorndyke’s former student, who happened to find the constable body and served as the consulting physician of the potter. Dr. Oldfield once again found a trace of murder: ashes of cremated...