With that he at once dashed off frantically in the direction of the signal-station to order the water to be turned off at the upper reservoir, which was situated many hundred feet above the level of the mine, and was fed from the Sierra Madre Mountains, twenty miles away. Meanwhile Mr. Sandham realized that with the bursting of the pipe the tunnel must have been instantly flooded with an immense volume of water, and that the unfortunate manager and his staff were caught like rats in a trap. At that very moment they were, without a doubt, fighting desperately for their lives. With characteristic energy Mr. Sandham's one desire was to help in the work of rescue, but the very thought of the men's seemingly hopeless plight left him with a sickening feeling of impotency. He quickly decided, however, that the one place where he might be of use was at the outer end of the tunnel, from which the escaping waters rushed headlong over a precipice, to fall in a series of frightful leaps some thousands of feet into the river far below. To reach this spot Mr. Sandham had to climb the high bluff through which the tunnel was cut, and descend the almost perpendicular cliff on the other side. The climb itself was no mean test of a man's agility and nerve, but Mr. Sandham has both, and he was soon at the summit. As to how he got down the other side Mr. Sandham says he is to this day not quite clear, but judging from his battered and bleeding condition and the state of his clothing afterwards he thinks he must have done so by alternately falling and sliding. [Illustration: "MONITORS" AT WORK--THE PRESSURE OF THE WATER IS SO TERRIFIC THAT THE SOLID ROCK IS LITERALLY WASHED AWAY. OUR ILLUSTRATION IS FROM A DRAWING MADE BY MR. SANDHAM WHILE IN CALIFORNIA.] Exhausted and breathless, he finally reached the short section of the flume, immediately under the outlet of the tunnel, leading to the edge of the precipice. At that instant a dark object shot like a ball from a cannon out of the cavern into the flume, and was carried along and swept over the edge of the cliff. Mr. Sandham discovered afterwards that this was the body of the ill-fated mine-manager. After an interval of a few seconds another body was fired out of the tunnel, and as it swept down the flume towards him Mr. Sandham instinctively reached out his arm to catch it. Next instant his hand was grasped with a convulsive grip, the man's body swung out to the rush of the water, and Mr. Sandham knew that on the strength of his arm depended a human life.