"That is no matter. It is downhill all the way, and if you hold on behind me we shall go more quickly and more quietly than on horseback."

"There is the coming back," Romaña objected. "We cannot ride back without petrol."

"True. Your friend Señor Galdos has got to get some petrol. That's part of his job."

"I don't believe there is any in the town."

"Well, if there isn't we must lay up the cycle in your cave until we can get some from San Juan or elsewhere. The machine is no good up here in the hills. We might just as well make what use of it we can."

Romaña said no more. Argument was never effective with Tim when he had made up his mind. They slept through the afternoon, and started about an hour before dusk, watched with much curiosity by the motley crew of Señor Mollendo's adherents. As Tim had said, the track ran generally downhill, switchbacking here and there, but most of the ascents being too short to necessitate their dismounting. Occasionally there was a long stretch upwards, where they had to push the machine. On reaching the river they descended the bank and pursued their way along the hard sand. The incline, though slight, was sufficient to keep the wheels rolling, and their progress was so silent that nobody beyond a dozen yards could have detected their presence by the ear.

On approaching the western end of the gully that led up to the camp they kept a wary look-out in the gathering darkness. At this hour it was unlikely that the enemy would be abroad unless they had some definite object in view. They had hitherto shown no evidence of enterprise. The departure of the Prefect seemed to have robbed them of initiative. There was some slight risk of their having discovered the wheel marks of the cycle in the sand if any parties had been prowling in the course of the day. But when the scouts had passed the junction of the river with the cross track in safety, they felt secure. A few miles farther down they left the river and returned to the track. The only danger now was that they might meet some one coming from San Rosario to the camp; but the ringing sound of hoofs on the hard track could be heard for a long distance in the silence of the night, and they would have warning in time to hide somewhere before the riders drew near. In any case it was unlikely that horsemen from the town would choose the longer route.

They had now an easy run down to the spot where the little hill stream cut across the track. Tim could not venture to light his lamp; but the sky was not so dark as on the previous night, and he had no difficulty in dodging the loose rocks which lay upon the track here and there. On arriving at the stream, they dismounted and carried the machine to the cavern. This was the most toilsome portion of their journey; the rest of it had been accomplished almost without exertion.

Romaña lit his lamp, and brought out from the cupboard a tin of biscuits and some potted beef. The waterfall gave them drink. As they ate their supper they discussed their plans.

"I will walk into the town to-night, señorito," said Romaña, "see my friend, and commission him to buy the provisions. I shall tell him to purchase only a small quantity at any one shop, so as not to awaken suspicion. To-morrow I shall remain secluded in his cottage, and return here with the mules in the evening."