Drop To His Death (also published under the title Fatal Descent) is a mystery novel by the American writer John Dickson Carr, in collaboration with British author Cecil Street.

Neat variation of good old 'hermetically sealed room' problem, with two authors - and their sleuths - working beautifully in harness.

Inspector Hornbeam and Dr. Horatio Glass are at odds from the beginning, each dismissive of the other's theories, thus creating an atmosphere as much of competition as cooperation.

His legs were outthrust stiffly, his back bent a little forward; and the brim of the rakish gray hat shaded his face.

He might have been a grotesque parody of Little Jack Horner, if it had not been for the widening bloodstains on the left breast of his jacket.