The matter being put thus, Billy would by no means agree to it, but insisted that he would take his turn with me at digging. He asked me, however, how the earth was to be carried away, for if we did it with our hands it would take a month of Sundays. I answered that we must certainly make some baskets, which was a pretty easy matter after a little practice, there being plenty of rushes and such-like things growing at the borders of the lake. Having made two very fair baskets, that would hold about a bushel apiece, we began with our spades to cut away the earth around the hole, Billy carrying it outside the hut when I dug, and I doing the same when he dug. This work was exceeding laborious, since when digging we had to be very careful not to let the earth fall down the shaft and choke it up, and also the basketfuls of earth had to be hauled up every few minutes. We were several days at the work before we came to the bamboo pipe we had driven in from the lake side--not, of course, that we did nothing else, having our other duties to attend to, and besides we now went up to our watch-tower three times, and sometimes four, every day, so that the savages should not come in their canoes and take us by surprise. [Sidenote: The Cavern] Having got down to the pipe, which, as I have said, was but a few inches above the cavity into which we had broken, we saw that we must be even more careful, for if the earth should give way all of a sudden, as it did before, we might for all we knew be hurled into a bottomless abyss. All the time we had been digging we had felt the current of cool air striking upward against us, from which it was plain that the chamber below was not a perfectly closed vault, and the only comfort we had of this was that we were certainly not coming to the old smoker's kitchen, as Billy called it, for then the air would have been hot. To avoid this headlong fall, I considered we should now cease to stand on the ledge of earth at the side of the hole, and rig up a rope ladder which we might attach securely to the doorposts above. Billy was digging when this idea came into my head, he being lighter than I, and after I told him of it he scrambled up very quickly by means of steps we had cut in the side, confessing he was glad to get out in safety.