The little serpent had settled itself upon the lad’s bare throat, and a reckless movement upon the part of the spectators, a hasty waking on the sleeper’s part might end in a venomous bite from the awakened beast.

“What shall we do, Yussuf?” whispered, the professor in a hoarse whisper. “I dare not fire.”

“Be silent, effendi, and leave it to me,” was whispered back; and, while the two Englishmen looked on with their hearts beating anxiously, the Turk slowly advanced, taking the attention of the serpent more and more.

As he approached, the venomous little creature crept from the boy’s neck on to his chest, and there paused, waving its head to and fro, and menacingly thrusting out its forked tongue.

The danger to be apprehended was a movement upon the part of Lawrence, who appeared to be sleeping soundly, but who might at any moment awaken. Yussuf, however, was ready to meet the emergency, for he slowly continued to advance with his staff thrown back and held ready to strike, while, as he came nearer, the serpent seemed to accept the challenge, and crawled slowly forward, till it was upon a level with the lad’s hips.

That was near enough for Yussuf, who noted how Lawrence’s hands were well out of danger, being beneath his head.

He hesitated no longer, but advanced quickly, his companions watching his movements with the most intense interest, till the serpent raised itself higher, threw back its head, and seemed about to throw itself upon its advancing enemy.

The rest was done in a flash, for there was a loud whizz in the air as Yussuf’s staff swept over Lawrence, striking the serpent, rapid as was its action, low down in the body, and the virulent little creature, broken and helpless, was driven over the edge of the precipice to fall far away among the bushes below.

“Hallo! what’s that?” cried Lawrence, starting up. “Oh, you’ve got here, then.”

“Yes; we are here, my lad,” cried the professor, catching one hand, as the old lawyer took the other. “Are you much hurt?”