“NOW,” said Marjory, at last disengaging herself from me, “let us get down to business. We’ve got to find the treasure, you know!” So we set ourselves down to a systematic search. We explored one after another all the caves leading out of the main cavern. Some of them were narrow and tortuous; some were wide and low with roof dropping down, down, until it was impossible for anything in the shape of humanity to pass. All these, however, with one exception, ended in those fissure-like clefts, running somewhere to a point, which characterise cavern formations. The exception was at the north west side of the cavern where a high, fairly wide passage extended, with an even floor as though it too had been levelled by rolling pebbles. It kept on straight for a good length, and then curved round gently to the right, all the while fairly maintaining its proportions. Presently it grew so high that it was like a narrow way between tall houses. I lit a white light, and in the searching glare noticed that far overhead the rocky walls leaned together till they touched. This spot, just above us, was evidently the highest point; the roof thence fell rapidly till at last it was only some ten feet high. A little further on it came to a sudden end.
Here there was a great piled-up mass of huge, sharp-edged rocks, at the base of which were stones of all[286] sizes, some round and some jagged. Scattered near and isolated were many stones rounded by constant friction.
As I looked, the whole circumstances seemed to come to me. “See,” I cried to Marjory, “this was evidently another entrance to the cave. The tides, ebbing or flowing, drove in through one way and out at the other; and the floor was worn level in process of countless years by rolling pebbles like these. Then came some upheaval or wearing away by water drift of supporting walls of rock; and this mouth of the cave fell in. We must be by now somewhere at the Cruden side of Whinnyfold; we are facing almost due north.”
As there was manifestly nothing to be done here, we took our way back to the main cavern. When we began to look around us for a new place to explore, Marjory said:
“There doesn’t seem to be any treasure cave at all here. We have now tried everywhere.” Then it was that my mind went back again to the Don’s description “Black on the one hand and red on the other.” “Come,” I said, “let us go back till we find the joining of the gneiss and granite.” As we went back the floor was almost dry; only a few pools of water here and there, lying in the depressions, called attention to the fact that we were under tidal influence. As we went we kept a careful look-out for the fusion of the rocks; and found it where the passage with the descending roof debouched into that which led from the blocked up entrance of the cave. There was here, however, no sign of another passage, and the main one outside was like that under my own house, entirely through the gneiss.
I could not help feeling a little disappointed. For many weeks my mind had been set on finding the Pope’s treasure; and though I believe it was not greed which controlled me even to any great extent, I was deeply[287] chagrined. I had a sort of unworthy fear that it might lower me in the eyes of Marjory. This feeling, however, was only momentary; and when it went, it went for good. Drawing in my note-book a rough outline of Whinnyfold, I dotted lines where I took the various branches of the cave to lie and then marked in the line of fusion of the gneiss and the granite as it was manifest on the cliffs and on the shore beyond. Marjory was at once convinced; indeed when I saw my surmise put down in black and white it seemed to me quite apparent that it must be correct. The treasure cave must be within that space which lay between the dismantled entrance on the side of the Skares, and that which had fallen in on the north side. The logical inference was that if there was an entrance to be found at all it would be close to the debris from the Don’s explosion. So we took in silence, our way back to that point and began at once to examine the debris for any sign of an opening in the rock to the north side. Marjory scrambled up to the top of the pile whilst I explored the base. Turning my lantern on the rocky wall I began to examine it foot by foot and inch by inch.
Suddenly Marjory cried out. I raised my head and looked at her. Her face, lit by the rays of my own lamp which, with the habit of searching now familiar to me I had turned as my eyes turned, was radiant with joy and excitement.
“Look! look!” she cried. “Oh, Archie, there is the top of an opening here. The stones fill it up.” As she spoke she pushed at a stone on the top of the pile; under her hand it moved and disappeared with a hollow rattle. By this time I had scrambled up the slippery pile and was beside her. The disappearance of the stone had enlarged the opening, and something like a foot square was discovered.
So we began to work at the heap of stones, only we[288] pulled and threw them into the cave where we were so as not to block the place we aimed at. The top layer of stones was easy to move, as they were comparatively small, and were not interlocked, but below them we found a much more difficult task. Here the rocks were larger and more irregular in shape, and their points and edges interlocked. We did not mind, however, but toiled on. I could not but notice as we did so, a trait of Marjory’s coolness of head in the midst of all her excitement, when she took from her pocket a pair of heavy gloves and put them on.
In some fifteen or twenty minutes we had unmasked a hole sufficiently large to pass through comfortably. I found that the oil of my lamp was running low; so I refilled it and Marjory’s also. Then holding my own lamp carefully, whilst Marjory turned hers in the direction I was going, I passed over the top of the miniature moraine, and in a few seconds was on the floor of the other cave. Marjory threw me the ball of string and scrambling down joined me at once. We went along carefully, for the roof of the cave dipped very low and we had in more than one place to bend considerably; even then we were walking in a couple of feet of water as the floor dipped as well as the roof. When we had gone some distance, however, the roof rose as the cave turned sharp to the left, round a corner of very broken and jagged rock in which I could see signs of the fusion of the two geological formations. Our hearts beat high and we took hands instinctively; we were no............