But Dan had misunderstood the pigmy's wishes, for as soon as the long cane was clear he caught it up, turned back with Mak to where the serpent lay, and waited while the big black pierced a hole in the serpent's neck. The cane was passed through, and then each taking hold of one end, they dragged the reptile over the ground out of the opening of the kraal, and then onward to where the kopje ended in a little precipice by which the bright stream of the river glided fast. Here they stood swinging it backwards and forwards a few times, let go together, and the nearly dead serpent fell into the water with a splash and was swept away. "That's an end of him, then, Dean," said Mark. "Come on; let's get back. I want to find something before we give up for to-day;" and hurrying on, leaving the two blacks to follow at their leisure, and, as it struck the boys, rather unwillingly, the excavation was reached. "Come along," said the doctor. "I have been waiting for you before I began, for I did not want you to miss whatever we find next. Now, Denham." Buck seized the spade, leaped into the hole, and began to ply the tool energetically, while the two keepers used the baskets, and Dan danced about, as active as a cat, seizing the stones that were thrown out; and in this way the hole was deepened. "You don't seem to find anything," said Sir James. "We haven't got to the bottom yet," replied the doctor. "Perhaps there is no bottom," said Mark, laughing. "Don't you see," said the doctor, "that we are standing in the interior of some old building? It must have had some form of paving for the bottom, and what we are clearing away is the rubbish that has fallen in. Go on Denham. We shall find something before long." The doctor was right, for before many minutes had elapsed the big driver, who drove the spade in energetically and with all his strength, suddenly shouted, "Bottom!" and stood tapping the spade down upon something hard. "Only another stone, messmate," cried Dan. "Nay; smooth, hard bottom," said Buck. "Look here;" and after lifting out several spadefuls of the loose stuff he scraped the tool backwards and forwards over what seemed to be a perfectly level surface. "You are quite right, Denham," said the doctor excitedly, "and you have proved my words. Now then, Dance; jump down with that shovel and help Denham clear out the loose stuff." This took some little time, but at last the two men stood up in the square hole, which was thoroughly cleared out, and exposed the level flooring of the old building beneath one of whose walls they had been at work. "What?" cried the doctor, in answer to a question. "How far does it go? It is impossible to say without clearing out the whole extent of the place. What is the bottom, Denham--slabs of stone or bricks?" "Neither, sir. As far as I can make out it's a kind of cement." "Then that proves that the building can't be as old as we thought," said Sir James.