Murder Mirage / Mystery Under the Sea

Was listed as Robeson and Dent. Robeson is a house and Dent was the most common author.

Apparent first edition of this selection.
This entry is for the initial printing.
No 18 of the Blackmask reprints (was listed with Dent and Robeson). Dent was the most common author to use that house name. Removed until someone can find one to actually check the copyright page.