"The sea for me," remarked Philip, thankfully; "anything but being boxed up in this place, with a chance of falling five or six thousand feet without hope of getting out of the carriage."

In truth the journey was singularly unpleasant in many places. Jack had constructed his line thoroughly well; but there was no denying that the sudden turns, the unexpected descents, the narrow bridges, and the frequent tunnels, were enough to shake the nerves of the strongest man. On all sides arose the snow-clad peaks, far below ran rivers, spread forests, gaped cañons and between heaven and earth crawled the train, holding on to the sides of mountains. The colours and lights sweeping over the scenery were exquisite, the landscape below, above, was grand and impressive, but the four men in the carriage felt somewhat nervous at this tremendous journey. In ordinary cases, they were brave enough, and prepared for any emergency; but boxed up in this carriage they felt helpless should an accident occur. As to Jack, he was used to such travelling, and looked at his work with great pride.

At length the engine shot from a deep and narrow cutting into the depths of a broad-spreading forest, clothing a deep valley. Through its centre ran a torrent, and the line skirted this to the left, through dense woodland, towards the high peaks of a mountain in the far distance. Midway in this valley the engine slowed down, and ultimately stopped. Philip, looking out of the window, saw a wide clearing, with upturned soil, fallen trees, and here and there huts erected. It was the terminus of the railway; and, thankful to have arrived in safety, they all jumped out on to the sward with alacrity.

Beyond this clearing appeared a track cut through the forest, trending in the direction of the distant peaks, but the line stopped at the beginning of this avenue. Scattered rails, piles of sleepers, the abrupt termination of the line, showed that it went no further. Between this point and the unknown city of Totatzine intervened a distance of twenty miles. The little party, with their guns and revolvers all in order, stood looking around them at the unfinished line. Pepe, guarded by the two soldiers, was sullen and watchful.

"And where is Totatzine?" said Rafael, staring round this wilderness of trees.

Pepe pointed to the north-east, beyond the peaks.

"It is there, Señor. In the hollow of the hills."

"And the buried city?"

"Bueno! I will show it to you, Señores."

"One moment, Pepe," said Jack, staying the zambo, as he turned off to the left, "how can you tell the way to this city from here?"