The Invisible Millionaire
Written by
Leslie Charteris
Copyright 1939
First published in The Daily Mail (May 10-24, 1938) then in 2 issues of Black Mask (US - Jun. 1938 & UK - Jun. 1938). Also published in the collections and .
A message invites the Saint to a clandestine meeting with a woman about a major con going on. When he arrives, he finds her dead.