1935 Morrow hardcover as The Clew of the Forgotten Murder as by Carleton Kendrake
April 1953 Pocket paperback reissue, 19th printing
cover painting by Frank McCarthy
better image than previously posted
cover art by Ernest Chiriacka (Darcy)
April 1960 Dell paperback reissue, first printing
cover painting by Robert McGinnis
better image than previously posted
1947 Morrow hardcover, first edition. Original dust jacket.
29th Perry Mason novel
March 1952 Pocket paperback reissue, third printing
cover art by Earle Bergey
November 1960 Pocket paperback reissue, 5th printing
cover art by Charles Binger
better image than previously posted
November 1959 Cardinal paperback reissue, first printing
cover art by Charles Binger
better image than previously posted
SMB Noir 
