"Doctor, with your permission I'm going to unship the magnetic bowsprit and set it here as a beacon. We must be way above the Magnetic North by now and it is pulling us backward instead of forward."

"Very good," I answered. "Your idea has merit."

He touched his cap pleasantly and went forward. I liked the idea of leaving a beacon or cairn. It is the proper thing among explorers. Here and there we had run across them, an occasional pile of snow, topped by a gin bottle enclosing a message from some previous expedition, empty containers of various sorts whose labels were mute memorials to the achievement of the great white race! Walker, Haig and Booth, imperishable names these, with a solemn splendor when found on the white register of the North.

I watched the work with interest. Plock and Miskin were busy at the bow-chains, Swank, Wigmore and Frissell prepared the site, hewing out rude blocks with their ice picks, while Sausalito cackled encouragement. She was knitting a slip-on of reindeer yarn.

Suddenly a shout of dismay rose from under our forefoot. I saw Plock and Miskin struggling with the bowsprit. Evidently they had completely miscalculated the strength of the magnetic pull.

"Help!" cried Plock.

I sprang forward, even as the others threw down their picks and dashed toward the bow.

We were too late.

Jammed against the side of the ship, his hands torn and bleeding Miskin was forced to relinquish his grasp. With but the weight of Plock at its butt end the long pole shot off at an angle across the ice.