At eight o'clock it got very dark; now was the time to start. The horse prepared for Mulrady was brought out. His feet, by way of extra precaution, were wrapped round with cloths, so that they could not make the least noise on the ground. The animal seemed tired, and yet the safety of all depended on his strength and surefootedness. The Major advised Mulrady to let him go gently as soon as he got past the convicts. Better delay half-a-day than not arrive safely.

John Mangles gave his sailor a revolver, which he had loaded with the utmost care. This is a formidable weapon in the hand of a man who does not tremble, for six shots fired in a few seconds would easily clear a road infested with criminals. Mulrady seated himself in the saddle ready to start.

"Here is the letter you are to give to Tom Austin," said Glenarvan. "Don't let him lose an hour. He is to sail for Twofold Bay at once; and if he does not find us there, if we have not managed to cross the Snowy, let him come on to us without delay. Now go, my brave sailor, and God be with you."

He shook hands with him, and bade him good-by; and so did Lady Helena and Mary Grant. A more timorous man than the sailor would have shrunk back a little from setting out on such a dark, raining night on an errand so full of danger, across vast unknown wilds. But his farewells were calmly spoken, and he speedily disappeared down a path which skirted the wood.

At the same moment the gusts of wind redoubled their violence. The high branches of the eucalyptus clattered together noisily, and bough after bough fell on the wet ground. More than one great tree, with no living sap, but still standing hitherto, fell with a crash during this storm. The wind howled amid the cracking wood, and mingled its moans with the ominous roaring of the rain. The heavy clouds, driving along toward the east, hung on the ground like rays of vapor, and deep, cheerless gloom intensified the horrors of the night.

The travelers went back into the wagon immediately Mulrady had gone. Lady Helena, Mary Grant, Glenarvan and Paganel occupied the first compartment, which had been hermetically closed. The second was occupied by Olbinett, Wilson and Robert. The Major and John Mangles were on duty outside. This precaution was necessary, for an attack on the part of the convicts would be easy enough, and therefore probable enough.

The two faithful guardians kept close watch, bearing philosophically the rain and wind that beat on their faces. They tried to pierce through the darkness so favorable to ambushes, for nothing could be heard but the noise of the tempest, the sough of the wind, the rattling branches, falling trees, and roaring of the unchained waters.

At times the wind would cease for a few moments, as if to take breath. Nothing was audible but the moan of the Snowy River, as it flowed between the motionless reeds and the dark curtain of gum trees. The silence seemed deeper in these momentary lulls, and the Major and John Mangles listened attentively.

During one of these calms a sharp whistle reached them. John Mangles went hurriedly up to the Major. "You heard that?" he asked.

"Yes," said McNabbs. "Is it man or beast?"

"A man," replied John Mangles.

And then both listened. The mysterious whistle was repeated, and answered by a kind of report, but almost indistinguishable, for the storm was raging with renewed violence. McNabbs and John Mangles could not hear themselves speak. They went for comfort under the shelter of the wagon.

At this moment the leather curtains were raised and Glenarvan rejoined his two companions. He too had heard this ill-boding whistle, and the report which echoed under the tilt. "Which way was it?" asked he.

"There," said John, pointing to the dark track in the direction taken by Mulrady.

"How far?"

"The wind brought it; I should think, three or four miles, at least."

"Come," said Glenarvan, putting his gun on his shoulder.

"No," said the Major. "It is a decoy to get us away from the wagon."

"But if Mulrady has even now fallen beneath the blows of these rascals?" exclaimed Glenarvan, seizing McNabbs by the hand.