Page:The Mystery of the Sea.djvu/294

280 had fallen had I seen anything at all. Of course it may have been that the red light which I had burned had misled me by overwhelming everything in its lurid glow. So this time I got a white light out of the box and lit it. The effect was more ghastly and less pleasant. In the revealing glare, the edges of everything stood out hard and cold, and so far repulsive that instinctively Marjory drew closer to me. While the light remained, however, I was able to satisfy myself of one thing; all around was only the red granite. Colour and form and texture all told the same thing; we had passed the stratification of gneiss and entered on that of the sienite. I began to wonder and to think, though I did not at once mention the matter to Marjory. The one guiding light as to locality in the Don's narrative was the description of the cave "the black stone on one hand and the red on the other." Now at Broad Haven the gneiss and the red sienite join, and the strata in places seem as if welded together or fused by fire. Here and there can be found patches in the cliff where it is hard to say where one class of rock ends and the other begins. In the centre bay, however, to the north of my house, there is a sort of dip in the cliff covered deep with clay, and bright with grass and wild flowers. Through this a tiny stream rushes in wet weather, or in dry trickles down the steep incline. This is the natural or main division between the geological formations; for on either side of it is a different kind of rock—it was here that I expected to find that the treasure cave was situated. It had been of course impossible for me, though I had had a compass with me, to fix exactly the windings of the cave. I knew, however, that the general trend was to the right; we must, therefore, have passed behind the treasure cave and come into the region of red granite. I began to have an idea, or rather the rudiment of one, that later on we should have to go back on our