The engines started without a hitch. The huge contrivance trembled and strained at the mooring ropes, as if eager to dash into the fray. To Leslie's great satisfaction, the "pull" of each propeller was equal to the other. It was a triumph for his skill in adjusting the other.
"Everything correct, sir," he reported, after having switched off the current.
"Good," ejaculated Ranworth. "We'll start at once. Nothing overlooked in your department, Rogers; nor in yours, Payne?"
Both seamen expressed their opinion that the gear for which they were responsible was quite in order.
"Good-bye, my lads," exclaimed Ranworth, addressing the ship's company.
The work of cutting a channel for the Polarity had been temporarily suspended in order that the men might bid the rescue party God speed. Led by Captain Stormleigh, the men gave three rousing cheers, waving their ice-axes and crowbars with the utmost enthusiasm.
"Cast off, there!" ordered Captain Stormleigh.
Half a dozen of the Polarity's crew promptly released the grapnels. The sleigh was now free to proceed.
Ranworth turned towards Leslie and held up his hand.
A touch on a switch, and both propellers began to spin rapidly. For a brief interval the sleigh quivered, without making any definite progress; then, almost imperceptibly gathering way, she glided smoothly in the direction of Desolation Inlet.