“As many as you like!” replied John. “Or a six foot wall, coped and dashed, for that matter!”

“What, with you up, Soldier? Come, now, Mollie! We’d best give that big daisy-cutter a lead!”

The mare nipped neatly over the hedge, and Chirk led the way through the spinney to the fields John had seen from the lane. The mist still lay heavily over them, but it was not thick enough to impede the riders’ progress. They made their way diagonally towards the lane, and came to it half a mile to the north of the farm on the further side of it. The mare went over the bank cat-fashion, but Beau took bank and hedge flying, which made Chirk say, “One of these neck-or-nothing coves! And lucky if the prad ain’t strained a tendon!”

But Beau was sagacious and the Captain clever in the saddle, and the wheel to the left when he alighted was accomplished without any such mishap. The tumbled mass of the hills could now be seen quite clearly ahead, and, after another quarter of a mile, the lane took a sharp turn, beginning the steep ascent over the pass. The Captain reined in.

“We’ll try to the east,” he said. “That’s where I noticed the clefts, and the limestone outcropping. The slope is milder to the west, not so likely, I fancy.”

“Just as you say, Soldier,” responded Chirk amiably.

The bank which had been built up round the farmlands had come to an end a few hundred yards to the south, and there was only a narrow ditch to be stepped over. Beyond it the land was uncultivated. Birch trees reared up out of a mass of tangled undergrowth, and even found a foothold on the precipitous slopes of the escarpment; and every now and then a boulder sticking up out of the ground showed how thinly the earth lay above the rock. At a walking pace, John led the way along the outskirts of the bushes, keenly scrutinizing the face of the hill. This was, in many places, very sheer, and there were several deep indentations where the rock showed as naked as though the covering earth had been scraped from it. John said over his shoulder: “There might be caverns in any of these clefts.”

“Wery likely there are,” replied Chirk, “but it don’t look like anyone’s been near ’em for many a year. Of course, if you’re wishful to push your way through all these brambles, I’m agreeable.”

“No, we’ll go on,” John said.

They had not far to go before, rounding a spur, John saw something that caused him to pull Beau up so sharply that the mare, following him closely, nearly jostled him. “Look!” John said, pointing with his whip. “Someone has been here before us!”