Adam Salton felt that he would never be able to free his mind from the memory of those dreadful moments. The gloom which surrounded that horrible charnel pit, which seemed to go down to the very bowels of the earth, conveyed from far down the sights and sounds of the nethermost hell. The ghastly fate of the African as he sank down to his terrible doom, his black face growing grey with terror, his white eyeballs, now like veined bloodstone, rolling in the helpless extremity of fear. The mysterious green light was in itself a milieu of horror. And through it all the awful cry came up from that fathomless pit, whose entrance was flooded with spots of fresh blood. Even the death of the fearless little snake-killer--so fierce, so frightful, as if stained with a ferocity which told of no living force above earth, but only of the devils of the pit--was only an incident. Adam was in a state of intellectual tumult, which had no parallel in his experience. He tried to rush away from the horrible place; even the baleful green light, thrown up through the gloomy well-shaft, was dying away as its source sank deeper into the primeval ooze. The darkness was closing in on him in overwhelming density--darkness in such a place and with such a memory of it! He made a wild rush forward--slipt on the steps in some sticky, acrid- smelling mass that felt and smelt like blood, and, falling forward, felt his way into the inner room, where the well-shaft was not. Then he rubbed his eyes in sheer amazement. Up the stone steps from the narrow door by which he had entered, glided the white-clad figure of Lady Arabella, the only colour to be seen on her being blood-marks on her face and hands and throat. Otherwise, she was calm and unruffled, as when earlier she stood aside for him to pass in through the narrow iron door. CHAPTER XIX--AN ENEMY IN THE DARK Adam Salton went for a walk before returning to Lesser Hill; he felt that it might be well, not only to steady his nerves, shaken by the horrible scene, but to get his thoughts into some sort of order, so as to be ready to enter on the matter with Sir Nathaniel. He was a little embarrassed as to telling his uncle, for affairs had so vastly progressed beyond his original view that he felt a little doubtful as to what would be the old gentleman's attitude when he should hear of the strange events for the first time. Mr. Salton would certainly not be satisfied at being treated as an outsider with regard to such things, most of which had points of contact with the inmates of his own house. It was with an immense sense of relief that Adam heard that his uncle had telegraphed to the housekeeper that he was detained by business at Walsall, where he would remain for the night; and that he would be back in the morning in time for lunch.