"What? The aqueduct? How do you know?"
"I built it. A man can creep through it; there is no more water in it. I have just come this way out of the city. The passage leads into an old temple at the Porta Capuana. Take thirty men and follow me!"
Johannes looked sharply at him.
"And if you deceive me?"
"I will walk between your drawn swords. If I lie, kill me."
"Wait," cried Johannes, and hurried away.
CHAPTER IV.
Shortly afterwards Johannes again appeared, accompanied by his brother Perseus and about thirty brave Armenian mercenaries, who carried, besides their swords, short battle-axes.
"As soon as we are inside, Perseus," said Johannes, "you must break open the sally-port to the right of the Porta Capuana at the moment when the others unfold our flag upon the walls. At this signal my Huns, who wait outside, will rush into the sally-port. But who keeps the tower at the gate? Him we must have."
"Isaac, a great friend of the Edomites. He must die!"