Edgar Rice Burroughs' Tarzan of the Apes #194

Tarzan is searching for the lost explorer Erich von Harben when he ends up in the middle of a conflict between the descendants of the old Romans. Erich is found by the benevolent Romans of the hidden city of Castrum Mare, where he is somewhat reluctantly named official historian. Tarzan ends up with the less sympathetic Romans of the rival city state of Castra Sanguinarius. Tarzan flees and continues the search for Erich.