“Or evaporation might preserve an equilibrium,” remarked Challenger, and the two learned men wandered off into one of their usual scientific arguments, which were as comprehensible as Chinese to the layman.

On the sixth day we completed our first circuit of the cliffs, and found ourselves back at the first camp, beside the isolated pinnacle of rock. We were a disconsolate party, for nothing could have been more minute than our investigation, and it was absolutely certain that there was no single point where the most active human being could possibly hope to scale the cliff. The place which Maple White’s chalk-marks had indicated as his own means of access was now entirely impassable.