Archie, the skilled tracker, was the one who all but betrayed us. His knee slipped on the seaweed, and he rolled off a boulder, bringing down with him a clatter of small stones. We lay as still as mice, in terror lest the man should have heard the noise and have come to look for the cause. By-and-by when I ventured to raise my head above a flat-topped stone I saw that he was undisturbed. The fire still burned, and he was pacing round it. On the edge of the pools was an outcrop of red sandstone much fissured by the sea. Here was an excellent vantage-ground, and all three of us curled behind it, with our eyes just over the edge. The man was not twenty yards off, and I could see clearly what manner of fellow he was. For one thing he was huge of size, or so he seemed to me in the half-light. He wore nothing but a shirt and trousers, and I could hear by the flap of his feet on the sand that he was barefoot. Suddenly Tam Dyke gave a gasp of astonishment. “Gosh, it’s the black minister!” he said. It was indeed a black man, as we saw when the moon came out of a cloud. His head was on his breast, and he walked round the fire with measured, regular steps. At intervals he would stop and raise both hands to the sky, and bend his body in the direction of the moon. But he never uttered a word. “It’s magic,” said Archie. “He’s going to raise Satan. We must bide here and see what happens, for he’ll grip us if we try to go back. The moon’s ower high.” The procession continued as if to some slow music. I had been in no fear of the adventure back there by our cave; but now that I saw the thing from close at hand, my courage began to ebb. There was something desperately uncanny about this great negro, who had shed his clerical garments, and was now practising some strange magic alone by the sea. I had no doubt it was the black art, for there was that in the air and the scene which spelled the unlawful. As we watched, the circles stopped, and the man threw something on the fire. A thick smoke rose of which we could feel the aromatic scent, and when it was gone the flame burned with a silvery blueness like moonlight. Still no sound came from the minister, but he took something from his belt, and began to make odd markings in the sand between the inner circle and the fire. As he turned, the moon gleamed on the implement, and we saw it was a great knife. We were now scared in real earnest. Here were we, three boys, at night in a lonely place a few yards from a savage with a knife. The adventure was far past my liking, and even the intrepid Archie was having qualms, if I could judge from his set face. As for Tam, his teeth were chattering like a threshing-mill. Suddenly I felt something soft and warm on the rock at my right hand. I felt again, and, lo! it was the man’s clothes. There were his boots and socks, his minister’s coat and his minister’s hat.