But at length the work was finished, the craft was taken down to the river, put in the water, and found to float true, and as buoyantly as an egg-shell. The trio therefore put their few belongings into her, not forgetting the two fine emeralds and the gold scales taken from the idol, embarked, and resumed their journey. They were now on the headwaters of a river which had its rise somewhere on the eastern slope of the Andes; and the water was icy cold, being in fact nothing but the drainings from an enormous glacier which could be seen, some forty miles away, clinging to the side of a majestic peak that towered nearly twenty thousand feet into the deep blue of the tropic sky. But that was a blessing rather than otherwise, for although they were not yet down among the plains the weather was intensely hot-- they being now immediately under the equator--and the coldness of the water helped somewhat to mitigate the stifling heat between the two great walls of forest which bordered the river on either hand. No sail was needed, for they were now travelling with the stream, which, being as yet little more than a mountain torrent, ran rapidly, so that a paddle over the stern to keep the craft in midstream was all that was necessary. But although the stream ran at the rate of fully six miles an hour their progress was not by any means as speedy as one might at first suppose, for rapids occurred at frequent intervals, and if these were found to be impassable it became necessary to carry the canoe past them through the forest. This plan, however, was only resorted to in extreme cases, for if, upon examination, it was deemed at all possible to shoot the rapids, they were shot; and as this sometimes happened as often as three or four times a day, the adventurers soon acquired a degree of dexterity in the art that they would have regarded as perfectly amazing at the beginning of their journey. On the evening of the fifth day of their journey down the river they chanced to camp at a spot which afforded them an exceptionally fine view of the mountain range to the westward; and when on the following morning they rose to prepare for the day's journey they saw that a terrific thunderstorm was raging about halfway up the eastern slope of the range. It was a magnificent sight, the clouds, black as night below, but brilliantly illuminated by the sun above, clinging to the mountain spurs in enormous masses which rolled together, parted, and rolled together again like charging squadrons, while the lightning, keen and vivid as molten steel, incessantly darted from their black breasts like the flashes of a platoon of musketry. And while this elemental warfare was raging furiously up there among the mountains it was brilliant weather where the wanderers were camped, with not a breath of wind to assuage the torrid heat. Stukely happened to make some remark upon the contrast to Vilcamapata, to which the old man replied: