The latter appears to have been an Ellery Queen novel which remained unpublished, although it is known that Long was the author of two other Queen novels - The Golden Eagle Mystery (1942) and The Green Turtle Mystery (1944).
A later work appears to have been an unpublished Ellery Queen mystery story, while Long is also known for writing two other Queen mystery novels, The Golden Eagle Mystery (1942) and The Green Turtle Mystery (1944).