But this curious discovery, in which Fray Antonio and I were deeply interested, did not forward our immediate purpose, which was to find a way out of the valley. We still cherished a faint hope, indeed, that we might find the King's symbol with the arrow pointing the way onward, and so be assured that the city buried in the depths of the lake was not the city of which we were in search. But in any event the need for getting out of the valley pressed upon us; and that we might accomplish our deliverance from this shut-in place, we examined closely the whole circuit of the cliffs at the western end. Not an inch of this great expanse of rock, for as far up the wall as our eyes could see clearly, escaped our attentive observation; yet nowhere was there, even by bold climbing, a place where the cliff might be scaled, still less an open path. And so, having walked slowly along the bottom of the cliffs to the edge of the lake on the north, and there turned upon our steps and come slowly back again to where we started from, and having made a like double journey of inspection to and from the edge of the lake to the south, we came at last to our first point of departure, and rested before the statue of Chac-Mool, disconsolate.
One discovery we had made in the course of our explorations which enabled us to understand how the fate that had overtaken the drowned city had fallen upon it. Close by the northern border of the valley we saw, high up above us, a vast rift more than a thousand feet wide in the face of the cliff; and below this the ground was torn into a deep wild channel, and everywhere huge fragments of rock were scattered over the ground. Here it was, then, that the water had poured in--bursting forth from a lake above--by which the city at one stroke had been overwhelmed. Some little notice, by the mighty roaring that must have accompanied so great a crash of rocks and so vast a rush of water, the dwellers in the city must have had; and the gleam of the pouring waters would have shown them the nature of the ruin that was upon them. There would have been time, before the water was waist-deep in the city streets, for them to make their way to the high mound on which their temple stood; and in the appalling horror of it all they might have clamored to their priests that a victim should be sacrificed to stay this terrible outburst of anger on the part of their gods. But it was more than likely that before the sacrifice could be completed they all--people, priests, and he who was to be sacrificed--perished together beneath the flood.