Published in Wizard #279-#298, June 14, 1975 - October 25, 1975. Reprinted in Red Dagger #17, April 1982, as The Secret of Black Island.
This mission starts out strange as Jake Jeffords is sent to meet up with and escort in agent XE-21, a man missing for the past three decades! Shortly after the rendezvous, XE-21 is murdered by a crossbow bolt. His dying words were to tell the Fat Man to be watching for the Shark Men, 'dangerous maniacs". The murdered agent had been living for those years in Burma and it is to that Southeast Asian nation that Jeffords heads to learn more.