Since time began, authors have been told to write what they know. James Holding (1907-1997) took that advice to heart. After his retirement from advertising, Holding began writing full-time. One of his early ghostwriting gigs was continuing the Ellery Queen Jr novels, which had first appeared in the 1940s. The two cousins who wrote as Ellery Queen, Fred Dannay and Manfred Lee, hired Holding to jumpstart the series after a lengthy hiatus. At the same time, Holding decided to write a series of short stories about fictional sleuths King Danforth and Martin Leroy, two collaborative mystery writers (whose character was named Leroy King) on their own around-the-world cruise with their wives. The cases on the high seas are masterpieces of deductions and logic, following the smallest clues to their logical deductions. The stories even included the title structure ¿The Location Object Mystery¿ as used in the early Ellery Queen mysteries, such as The Roman Hat Mystery and The Greek Coffin Mystery. Presumably the stories met with the approval of Dannay as the works appeared first in Ellery Queen¿s Mystery Magazine.