ashore, and Jerry made the boat fast by putting a big piece of stone on top of the rope. There was nothing like a beach or even a shelving rock to pull it up on, so that was the best we could do. The boat backed away as far as it could, but the rope was firmly wedged between the rock and the stone so it could n't get away.
Of course we went first to look at the black cave-entrance. Sure enough, a great flat slab had fallen down from it and lay half in the water,—we could see scratchy marks and broken places where it had slid. The cave itself was about six feet deep, and very dank and dismal-looking. There was no sign of there ever having been treasure, for nobody could possibly have buried it, unless they'd hewn places in the living rock, like ancient Egyptians. We might have thought of that before, but of course we did n't honestly believe that there was treasure.