[The twelve stories in "In Re: Sherlock Holmes"] are all in the pastiche vein and all written by Derleth himself…. The resulting book inevitably lacks variety, although some of the individual selections are not without a certain charm and an engaging fidelity in form and spirit to the originals they imitate. A few, like "The Adventure of the Norcross Riddle" … and "The Adventure of the Late Mr. Faversham" … are good enough detective stories in their own right; most of the other episodes are over-long and, it must be confessed, a little tedious, even to the confirmed Sherlockian, when read in close sequence.

Howard Haycraft, "Holmesian Pastiches," in The New York Times Book Review, December 2, 1945, p. 32.