"Let the youngster have a cut at it, sir," broke in Captain Stormleigh. "If the worst comes to the worst, we can fetch him back by means of the other sleigh, and do our best to get in touch with your brother's party by tramping it. But it strikes me, sir, that the lad is one who gets there somehow, as they say in the States. Let him try his hand, sir."

"How long do you think will it take to cut a passage for the Polarity?" demanded Ranworth.

"Five days, sir, at the present rate of progress. Less, if the pack is breaking up; more if the ice is 'jamming' away to the nor'ard."

"And five days even may be too late," rejoined Ranworth. "Leslie, I must accept your offer, and may good fortune attend our efforts."

The amended plan was forthwith put into operation. The hatches were uncovered, and the huge sleigh hoisted out by means of a derrick and landed on the ice. While Leslie was superintending the fitting of the twin propellers, upon the delicate adjustment of which depended the easy running of the enormous fabric, Ranworth, assisted by the second mate, was busily engaged in loading up the sleigh with stores and provisions necessary for the trip.

Ranworth was to take charge of the rescue party, and to be responsible for the correct course from Desolation Inlet to Observation Camp. Having no experience in mechanism or electrical engineering, he was compelled to entrust the care of the motors to Leslie Ward.

On the lad's skill the success of the dash to Observation Camp would largely depend, for in the event of a mechanical breakdown that could not be rectified by the person in charge, the sleigh and its occupants would be helplessly stranded, while the chances of rescuing Claude Ranworth's party would be very slight.

Guy was to accompany Leslie as his assistant, while two seamen having previous experience in Polar work, completed the crew of the sleigh.

At length the preparations were complete. A preliminary trial of the motors alone was necessary before setting out on the dash into the unknown.

Accordingly, the sleigh was anchored by two stout ropes attached to grapnels imbedded in the ice. There was no need to swing the propellers; a patent starting device enabled the operator to work everything in connection with the motors from the seat within the for'ard cabin.