Now that danger was actually upon him, Bob prepared instantly to meet it. In a flash he remembered the gully he had passed recently with Ah-Sam, and recognized that it was the nearest, indeed the only, defensible position within reach. It was so narrow that, near its summit, it might be held, he thought, by a few against a host. He at once ordered Ah-Sam to turn the cart and drive it as quickly as possible back to the spot where the waterfall emptied itself into the stream, and then up the steep, rocky gorge. In a few minutes the team was plunging through the broken ice at a great pace. Nothing but a Manchurian cart could have stood the strain. It was flung about at all angles; it cannoned against rocks, now one wheel, now the other disappearing in mud or snow; but it survived every shock, and drawn by its four sturdy beasts with Ah-Sam at their head, it groaned and creaked on its upward course until it reached an abrupt twist in the gorge about three hundred yards from its lower extremity. Meanwhile Bob had led the two ladies diagonally across the hillside by a shorter route than that taken by the cart. Mrs. Pottle bravely panted along, making tremendous exertions under her thick sealskin jacket to keep pace with Bob, who assisted her with his arm. Her niece stepped along as lightly as a doe, her cheeks flushed with excitement, and her wavy black hair escaping in disorder below her white tam o’ shanter. Gaining a point above the bend at which the cart had just arrived, Bob saw that the stream flowed around a huge granite boulder which had slipped, apparently at no very distant date, from the almost perpendicular cliffs above, blocking up the greater part of the already narrow defile. Here Bob shouted to Ah-Sam to stop and wedge the cart between the boulder and the opposite wall of the ravine. Looking round, he saw, some fifty feet above, to the left of the stream, the cleft near which the bear had been seated. It was visible now as a fault in the rock, a few yards across. The fissure narrowed towards its base, and from it a shelf of rock ran horizontally outwards, meeting the stream at an acute angle about a hundred yards from where Bob stood. Beyond this junction the gorge rapidly narrowed, and became extremely steep. Leaving the ladies to rest, Bob climbed up the rocky bed to explore, and found that after a time further progress was blocked by a perpendicular wall that rose sheer two hundred feet.