"And why are you a prisoner?" asked Tarzan.
"Because I am from Castrum Mare," replied the other.
"Is that a crime in Castra Sanguinarius?" asked the ape-man.
"We are always enemies," replied the other. "We trade occasionally under a flag of truce, for we have things that they want and they have things that we must have, but there is much raiding and often there are wars, and then whichever side is victorious takes the things by force that otherwise they would be compelled to pay for."
"In this small valley what is there that one of you may have that the other one has not already?" asked the ape-man.
"We of Castrum Mare have the iron mines," replied the other, "and we have the papyrus swamps and the lake, which give us many things that the people of Castra Sanguinarius can obtain only from us. We sell them iron and paper, ink, snails, fish, and jewels, and many manufactured articles. In their end of the valley they mine gold, and as they control the only entrance to the country from the outside world, we are forced to obtain our slaves through them as well as new breeding-stock for our herds.
"As the Sanguinarians are naturally thieves and raiders and are too lazy to work and too ignorant to teach their slaves how to produce things, they depend entirely upon their gold mine and their raiding and trading with the outer world, while we, who have developed many skilled artisans, have been in a position for many generations that permitted us to obtain much more gold and many more slaves than we need in return for our manufactured articles. Today we are much richer than the Sanguinarians. We live better. We are more cultured. We are happier and the Sanguinarians are jealous and their hatred of us has increased."
"Knowing these things," asked Tarzan, "how is it that you came to the country of your enemies and permitted yourself to be captured?"
"I was delivered over treacherously into the hands of Sublatus by my uncle, Validus Augustus, Emperor of the East," replied the other. "My name is Cassius Hasta, and my father was Emperor before Validus. Validus is afraid that I may wish to seize the purple, and for this reason he plotted to get rid of me without assuming any responsibility for the act; so he conceived the idea of sending me upon a military mission, after bribing one of the servants who accompanied me to deliver me into the hands of Sublatus."
"What will Sublatus do with you?" asked Tarzan.