It was indeed the full moon which shone straight down the aperture which opened upon the cliffs.  It was a small rift, not larger than a window, but it was enough for all our purposes.  As we craned our necks through it we could see that the descent was not a very difficult one, and that the level ground was no very great way below us.  It was no wonder that from below we had not observed the place, as the cliffs curved overhead and an ascent at the spot would have seemed so impossible as to discourage close inspection.  We satisfied ourselves that with the help of our rope we could find our way down, and then returned, rejoicing, to our camp to make our preparations for the next evening.

What we did we had to do quickly and secretly, since even at this last hour the Indians might hold us back.  Our stores we would leave behind us, save only our guns and cartridges.  But Challenger had some unwieldy stuff which he ardently desired to take with him, and one particular package, of which I may not speak, which gave us more labor than any.  Slowly the day passed, but when the darkness fell we were ready for our departure.  With much labor we got our things up the steps, and then, looking back, took one last long survey of that strange land, soon I fear to be vulgarized, the prey of hunter and prospector, but to each of us a dreamland of glamour and romance, a land where we had dared much, suffered much, and learned much—­our land, as we shall ever fondly call it.  Along upon our left the neighboring caves each threw out its ruddy cheery firelight into the gloom.  From the slope below us rose the voices of the Indians as they laughed and sang.  Beyond was the long sweep of the woods, and in the center, shimmering vaguely through the gloom, was the great lake, the mother of strange monsters.  Even as we looked a high whickering cry, the call of some weird animal, rang clear out of the darkness.  It was the very voice of Maple White Land bidding us good-bye.  We turned and plunged into the cave which led to home.

Two hours later, we, our packages, and all we owned, were at the foot of the cliff.  Save for Challenger’s luggage we had never a difficulty.  Leaving it all where we descended, we started at once for Zambo’s camp.  In the early morning we approached it, but only to find, to our amazement, not one fire but a dozen upon the plain.  The rescue party had arrived.  There were twenty Indians from the river, with stakes, ropes, and all that could be useful for bridging the chasm.  At least we shall have no difficulty now in carrying our packages, when to-morrow we begin to make our way back to the Amazon.

And so, in humble and thankful mood, I close this account.  Our eyes have seen great wonders and our souls are chastened by what we have endured.  Each is in his own way a better and deeper man.  It may be that when we reach Para we shall stop to refit.  If we do, this letter will be a mail ahead.  If not, it will reach London on the very day that I do.  In either case, my dear Mr. McArdle, I hope very soon to shake you by the hand.