His father turned it over, rubbed the dirt off it, and held it up to the light. It lay in his palm and winked in the light of the torch with dancing gleams of deep scarlet fire.

"Whew!" whistled Mr. Haydon, "a magnificent ruby, large, and of the purest water. Where did you get it, my boy?"

Jack pointed to the skeleton at his feet, among whose bones it had lain.

"Could this have been their secret treasure-room?" said Mr. Haydon, looking round. "Yet it is very unlikely. It is too large, and hardly in the place where they would have built it."

At this moment they heard a murmur at their shoulders. The woman had followed them, and they turned to see that she had picked up a couple of rubies from among the bones of another skeleton, and was holding them out to Mr. Haydon.

The great expert took them and examined them swiftly.

"Finer than the one you found in point of size," he said to his son.

"As to purity, they are all of the highest quality. These three stones in my palm represent a substantial fortune."

Jack had never before seen such magnificent stones. He gazed in wonder at the three gleaming splendours, and turned them over with his finger.

"They are true oriental rubies," said his father, "of the finest colour and without flaw. Any one of them is ten times as valuable as a diamond of the same weight."

The native woman was turning over the bones of another skeleton. She straightened herself, came forward, and dropped another n.o.ble ruby into Mr. Haydon's hand.

"Jack, Jack," cried the latter to his son, "don't you see what this means, my boy? Here is proof positive of the truth of the legend."

"I see," said Jack, "these are the monks who were said to have fled with the pick of the rubies."

"These are they without a doubt," said his father. "They disappeared, and the conquerors believed that they had escaped, and so the story of their flight was worked into the tradition. But they had hidden themselves here, and here they died. The rubies were shared among them, and concealed in their garments. The ants have made short work of the robes long since, and the stones have fallen among the bones."

"Then among these skeletons lie the chief treasures of the ancient city?" said Jack.

"The thing is beyond all question," replied his father. "These glorious stones bear ample witness."

The intense interest of this marvellous find had almost driven the thought of their enemies from their minds. But the recollection of their deadly peril came back in full flood when a hoa.r.s.e thunder broke out beneath their feet in the lower vault.

"The tigress!" cried Jack. "Is it a fresh a.s.sault?"

Not another thought did they give to the gleaming treasures within their grasp. Life was worth a mountain of rubies.

They rushed at once to see what U Saw and his retainers were doing.

Mr. Haydon did not even pocket the rubies, such was his haste. He tossed them aside among the mouldering bones, where they had lain for so many generations, and flew after his son, who was already climbing the ladder.

They raced across the room, and now heard the savage roars of the tigress pealing louder and louder up the narrow stairway. In the vault below they heard shots and yells.

"They have attacked her in her lair, there is no doubt of it," said Mr. Haydon in a tone of deep anxiety. "They have without doubt flung torches in to light the place up, and shot her as she stood before her cubs, checking her charge with fire, noise, and spears. I have known a band of them take as desperate a risk for the sake of a mere skin to sell, so they would certainly take it to seize us."

The growls of the tigress became more furious and deafening.

"They are running out!" cried Jack. "They are flying before her."

In the open s.p.a.ce below, the Kachins were running swiftly from the entrance to the vault. Some looked over their shoulders, as if fearing pursuit.

"Very possibly," said his father. "They are running for the moment, but I fear they have done their work. See how joyous they look!"

This was quite true. The dark faces of the little mountaineers were bright with smiles, and their teeth flashed white as they grinned at each other, and shouted as if in triumph.

"Their muskets at close range are not to be despised," murmured Mr.

Haydon uneasily. "They fling a heavy ball, and drive it with great smashing power. And again, the bullets may be poisoned. They often are."

The Kachins did not run far. They faced about, and three or four who were armed with spears threw their weapons forward, ready to receive the charge of the wounded creature. But no charge was made. Had the tigress been alone, she would have rushed out, but the presence of her cubs made a great difference. She stayed beside them, growling and roaring with rage and pain until the very building shook.

Half an hour pa.s.sed, and the tigress was now making no more than a low moan. Little by little her growling had died away. The Haydons heard the sound diminish with uneasy hearts. They knew that the strength of the great fierce beast was going with it, and that very soon the Kachins would be at the foot of the stairs.

They talked the situation over, and looked at it from every point of view, but could see only one thing to do. That was to wait for the enemy on the narrow winding steps, where but one could pa.s.s at a time, and hold them at bay.

Jack looked round. "Where's the woman?" he said, "she has not come up."

"No more she hasn't," said his father. They had been so deeply engaged in watching every movement of their enemies that they had utterly forgotten their companion. When Jack rushed up from the secret chamber, he had thrust the flaring torch into her hand, in order that she might follow at her leisure, but there was no sign of her in the room behind them.

Jack ran across to the spot where the square black hole yawned in the floor.

"It's all dark down here," he cried in surprise. "Has the torch gone out? But why has she not come up?"

Near at hand lay a large lock of dried gra.s.s, part of a bundle which the woman herself had gathered and brought up on their first entrance.

Jack caught it up, struck a match, and thrust the burning vesta into it. In an instant the tuft of gra.s.s was ablaze, and he flung it into the secret chamber. It dropped to the floor, and the flame shot up brightly, lighting the little room from corner to corner, from roof to floor.

"She's gone!" gasped Jack in utter amazement "She's gone!" Save for the skeletons, the little room was completely empty. There was not the faintest sign of the native woman. She had disappeared absolutely and entirely.

CHAPTER XL.

THE BATTLE ON THE STAIRS.

Jack was about to spring down the ladder and see what had become of their companion, when a low cry of warning burst from his father's lips. The elder man had been watching the enemy, and now he called out, "They are coming! they are coming!"

Jack caught up his _dah_ and ran at once for the stairs. The mystery of the woman's disappearance must wait; the first thing to be done was to keep the Kachins from their throats.

He and his father had already settled upon the point which they would occupy for defence. Halfway down the narrow winding flight there was a small landing, about six feet long, with a sharp turn above and below.

Jack felt his way down to this in the darkness, then stood and listened eagerly for any sounds of movement in the vault below. He heard his father softly tiptoeing after him, and then all was silence, save for the mournful cries of the tiger cubs trying to rouse their dead dam.

"They have not come in yet," whispered Jack to his father.

"No," replied Mr. Haydon, "but I saw seven of them start across the open s.p.a.ce, clearly bent on a fresh attack."

At this moment a m.u.f.fled sound of voices rang through the vault and came up the narrow stairs. The Kachins were at the entrance. Then there was silence for a short time. The next sound was a joyous yell, which rang and re-echoed from wall to wall. The Kachins had discovered the dead tigress. Then the vault resounded with voices as they ran to and fro, searching every corner.

The fugitives knew that the flight of steps running upwards must be discovered at once, and Mr. Haydon gave a low murmur as they heard a party of searchers gather at the foot of the stairs. Up to this moment Jack and his father had stood in complete darkness, but now a faint glimmer of light began to shine up from below, and they knew that the flare of their pursuers' torches was being reflected along the winding walls.