"I'm sorry, Frank," contritely said Billy, "I won't speak any more about it; but," he added to himself, "you can't keep me from thinking about it."

As Frank had anticipated, Captain Hazzard agreed to ship Billy Barnes as a member of the expedition. He was to be a sort of general secretary and assist the boys with the aeroplane and motor sledge when the time came. The reporter's face, when after a brief conference it was announced to him that he might consider himself one of the Southern Cross's ship's company, was a study. It was all he could do to keep from shouting at the top of his voice. The contrast between the dignity he felt he ought to assume before Captain Hazzard and the desire he felt to skip about and express his feelings in some active way produced such a ludicrous mixture of emotions on Billy's face that both the boys and the captain himself had to burst into uncontrollable laughter at it. Laughter in which the good natured Billy, without exactly understanding its cause, heartily joined.

A week later the final good-byes were said and the Southern Cross was ready for sea. She was to meet a coal-ship at Monte Video in the Argentine Republic which would tow her as far as the Great Barrier. This was to conserve her own coal supply. The other vessel would then discharge her cargo of coal,—thus leaving the adventurers a plentiful supply of fuel in case the worst came to worst, and they were frozen in for a second winter.

In case nothing was heard of them by the following fall a relief ship was to be despatched which would reach them roughly about the beginning of December, when the Antarctic summer is beginning to draw to a close. The commander of the Southern Cross expected to reach the great southern ice-barrier in about the beginning of February, when the winter, which reaches its climax in August, would be just closing in. The winter months were to be devoted to establishing a camp, from which in the following spring—answering to our fall—the expedition would be sent out.

"Hurray! a winter in the Polar ice," shouted the boys as the program was explained to them.

"And a dash for the pole to cap it off," shouted the usually unemotional Frank, his face shining at the prospect.

As has been said, the Southern Cross was an old whaler. Built rather for staunchness than beauty, she was no ideal of a mariner's dream as she unobtrusively cleared from her wharf one gray, chilly morning which held a promise of snow in its leaden sky. There were few but the stevedores, who always hang about "the Basin," and some idlers, to watch her as she cast off her lines and a tug pulled her head round till she pointed for the opening of the berth in which she had lain so long. Of these onlookers not one had any more than a hazy idea of where the vessel was bound and why.

As the Southern Cross steamed steadily on down the bay, past the bleak hills of Staten Island, on by Sandy Hook, reaching out its long, desolate finger as if pointing ships out to the ocean beyond, the three boys stood together in a delighted group in the lee of a pile of steel drums, each containing twenty gallons of gasolene.

"Well, old fellow, we're off at last," cried Frank, his eye kindling as the Southern Cross altered her course a bit and stood due south down the Jersey coast.

"That's it," cried Billy, with a wave of his soft cap, "off at last; we're the three luckiest boys on this globe, I say."