"You can't trust that zambo, Jack," he said, decisively; "he might take advantage of your being alone, and knock you on the head." "Scarcely, when I am armed and he is not. If only we two go, we can travel on the engine. If you all come, I must fix on a carriage." "Well, that won't make much difference," retorted Philip, quickly. "We are all keen on the business, and want to see how matters turn out. Tim, Peter, Rafael, and myself are all coming with you, Jack; so hitch on a carriage to your engine right away." This was accordingly done without further objection on the part of Duval, and they left Cuavaca about one o'clock, travelling rapidly so as to reach the terminus with as little delay as possible. According to Pepe, it would take some hours for them to discover the ruined city, and they did not expect to return before six o'clock. Then it would have to be decided whether they would take the troops on to the ruined city at once, or wait till the next day. Cuavaca was situate at the base of the great volcano Xicotencatl, which reared its white peak high above the surrounding mountains. North and south stretched ranges from the central point with summits more or less covered with snow, and from Cuavaca began dense forests which clothed the slopes of these mighty hills. Leaving the village by the side towards the north, the engine with its solitary carriage ran through a moderately long tunnel piercing a high range of hills, which shot outward at right angles from the principal mountains. From thence it emerged on to a deep valley, and skirted the side of the hills in a winding track cut out of the solid rock. Jack was on board the engine with the driver, personally superintending the journey, and his three friends with Rafael were admiring the view from the windows of the carriage. Pepe, guarded by two soldiers, was seated at the end of the carriage, and looked anything but cheerful under such surveillance.