The Affair of the Substitute Doctor

The activities of the medical profession have always interested writers of mystery novels, and this is not the first time that the ingenious mind of John Rhode has been attracted to this promising field, as will be remembered by readers of his masterly *Death in Harley Street*. The chief merit of the present book is, however, its intensely dramatic conclusion which comes as a complete surprise, although it is based on a mass of data patiently collected by the industrious Jimmy Waghorn.

But it was left to the Sage of Westbourne Terrace, Dr. Priestley, to marshal these facts and draw the logical conclusion…