Bob caught a look of approval in Ah-Sam’s eyes. The stranger being asleep, the company resumed the conversation at the point where his entrance had interrupted it. Where did the dangerous region begin? Some three miles from that inn. It was impossible to enter it without being discovered; no one indeed wished to enter it; if some incautious traveller did intrude within its borders, his only wish, and that a vain one, was to make his way out. The reason of its being so carefully guarded was that once the Mountain Tiger had narrowly escaped being surprised by a sotnia of Cossacks, and he had determined never to be caught napping again. On the outer edge of the prohibited district there were patrols by day and by night, and surprise visits were paid to every hamlet in the neighbourhood. Within, at a distance of about two miles from the fortress, there was a series of posts about a quarter of a mile apart, and the ground between them was studded with innumerable and unexpected obstacles. One only path led to the stronghold, and upon this men were constantly encamped. These particulars had been learnt at various times from members of the garrison when they came out on brief spells of furlough, and neither the landlord nor the man who had spoken most could vouch for the truth of all the details they had thus picked up. Ah-Sam enquired whether the obstacles mentioned completely encircled the fort. The question was answered by an old man who had hitherto taken little part in the conversation. There was no need, he said, for artificial obstacles on the farther side of the fort. He had been in it on one occasion many years ago, in the time of the old chief, and he knew therefore more about it than anyone present in that inn. Had any other of the company ever entered the stronghold? No, none had but himself alone. Sing-Cheng had just opened his mouth to contradict him when Ah-Sam gave a loud sneeze, the snoring figure on the k’ang stirred, and in the general rustle Ah-Sam whispered to the impetuous chief to be more carefully upon his guard. The old man continued, speaking in low tones and with a solemn air of mystery. On the other side of the fort, he said, was a ravine, so wide, so deep, so precipitous, that no other defence was needed. He remembered that, when he was a young man, one of the inmates of the fort had incautiously stepped too near the edge; he had fallen, and his mangled body was washed and battered by the foaming torrent until the vultures had picked his bones clean.