Mr. Ludgrove’s Invitation
April gave place to May, and May to June, with no further development in the mystery which surrounded the Praed Street murders. The discovery of the knife in the pocket of Mr. Copperdock’s overcoat, combined with the fact that although Dr. Priestley and Mr. Ludgrove had each received a numbered counter, they had not so far been menaced by any particular danger, had convinced the police that the secret had died with Mr. Copperdock. A very careful examination of the handle showed that it bore his fingermarks, and his son, although he could not account for its presence where he had found it, was emphatic that it could not have been placed there since the night of his death.