The watch was, however, carefully organised. Two of the settlers were to watch together, and every two hours it was agreed that they should be relieved by their comrades. And so, notwithstanding his wish to the contrary, Herbert was exempted from guard, Pencroft and Gideon Spilett in one party, the engineer and Neb in another, mounted guard in turns over the camp. The night, however, was but of few hours. The darkness was due rather to the thickness of the foliage than to the disappearance of the sun. The silence was scarcely disturbed by the howling of jaguars and the chattering of the monkeys, the latter appearing to particularly irritate master Jup. The night passed without incident, and on the next day, the 15th of February, the journey through the forest, rather tedious than difficult, was continued. This day they could not accomplish more than six miles, for every moment they were obliged to cut a road with their hatchets. Like true settlers, the colonists spared the largest and most beautiful trees, which would besides have cost immense labour to fell, and the small ones only were sacrificed, but the result was that the road took a very winding direction, and lengthened itself by numerous _detours_. During the day Herbert discovered several new specimens not before met with in the island, such as the tree-fern, with its leaves spread out like the waters of a fountain, locust-trees, on the long pods of which the onagas browsed greedily, and which supplied a sweet pulp of excellent flavour. There, too, the colonists again found groups of magnificent kauries, their cylindrical trunks, crowned with a cone of verdure, rising to a height of two hundred feet. These were the tree-kings of New Zealand, as celebrated as the cedars of Lebanon. As to the fauna, there was no addition to those species already known to the hunters. Nevertheless, they saw, though unable to get near them, a couple of those large birds peculiar to Australia, a sort of cassowary, called emu, five feet in height, and with brown plumage, which belong to the tribe of waders. Top darted after them as fast as his four legs could carry him, but the emus distanced him with ease, so prodigious was their speed. As to the traces left by the convicts, a few more were discovered. Some footprints found near an apparently recently-extinguished fire were attentively examined by the settlers. By measuring them one after the other, according to their length and breadth, the marks of five men's feet were easily distinguished. The five convicts had evidently camped on this spot; but,--and this was the object of so minute an examination,--a sixth foot-print could not be discovered, which in that case would have been that of Ayrton. "Ayrton was not with them!" said Herbert. "No," answered Pencroft, "and if he was not with them, it was because the wretches had already murdered him! but then these rascals have not a den to which they may be tracked like tigers!"