Smith would have set off at once, but as the expedition would take several days, it seemed better to load the wagon with all the necessaries for camping out. Now at this time one of the onagers, wounded in the leg, could not bear harness; it must have several days’ rest, and they thought it would make little difference if they delayed the departure a week, that is, till November 20. November in this latitude corresponds to the May of the Northern Hemisphere, and the weather was fine. They were now at the longest days in the year, so that everything was favorable to the projected expedition, which, if it did not attain its principal object, might be fruitful in discoveries, especially of the products of the soil; for Smith intended to explore those thick forests of the Far West, which stretched to the end of Serpentine Peninsula. During the nine days which would precede their setting out, it was agreed that they should finish work on Prospect Plateau. But Ayrton had to go back to the corral to take care of their domesticated animals. It was settled that he should stay there two days, and leave the beasts with plenty of fodder. Just as he was setting out, Smith asked him if he would like to have one of them with him, as the island was no longer secure. Ayrton replied that it would be useless, as he could do everything by himself, and that there was no danger to fear. If anything happened at or near the corral, he would instantly acquaint the colonists of it by a telegram sent to Granite House. So Ayrton drove off in the twilight, about 9 o’clock, behind one onager, and two hours afterwards the electric wire gave notice that he had found everything in order at the corral. During these two days Smith was busy at a project which would finally secure Granite House from a surprise. The point was to hide completely the upper orifice of the former weir, which had been already blocked up with stones, and half hidden under grass and plants, at the southern angle of Lake Grant. Nothing could be easier, since by raising the level of the lake two or three feet, the hole would be entirely under water. Now to raise the level, they had only to make a dam across the two trenches by which Glycerine Creek and Waterfall Creek were fed. The colonists were incited to the task, and the two dams, which were only seven or eight feet long, by three feet high, were rapidly erected of closely cemented stones. When the work had been done, no one could have suspected the existence of the subterranean conduit. The little stream which served to feed the reservoir at Granite House, and to work the elevator, had been suffered to flow in its channel, so that water might never be wanting. The elevator once raised, they might defy attack.