While Zellner’s adventure should have stopped once the train got its passengers to a cruise ship, a bump to the head at the wrong time had Zellner joining the inspector, the jewel he was protecting, and the jewel’s owner, a Baroness, as they made their way to Cairo for a showing of the gem.
The ship isn’t away from dock long before the Baroness is murdered, and Ancestry of Lies starts off not too long after Zellner has identified the ship’s new doctor, Gebhardt, as the murderer. Too bad, as this resulted in Zellner waking up strapped into a wheelchair with the bad doctor screwing up the courage to take our hero out of the picture permanently.