It was, as I have said, almost that of a sphinx, a dusky-hued sphinx, as though the matter which composed it had been oxidized by the inclemency of the polar climate.
And then a possibility flashed into my mind, an hypothesis which explained these astonishing phenomena.
"Ah!" I exclaimed, "a loadstone! that is it! A magnet with prodigious power of attraction!" I was understood, and in an instant the final catastrophe, to which Hearne and his companions were victims, was explained with terrible clearness.
The Antarctic Sphinx was simply a colossal magnet.

Under the influence of that magnet the iron bands of the _Halbrane's_ boat had been torn out and projected as though by the action of a catapult.
This was the occult force that had irresistibly attracted everything made of iron on the _Paracuta_.

And the boat itself would have shared the fate of the _Halbrane's_ boat had a single bit of that metal been employed in its construction.

Was it, then, the proximity of the magnetic pole that produced such effects?
At first we entertained this idea, but on reflection we rejected it.
At the place where the magnetic meridians cross, the only phenomenon produced is the vertical position of the magnetic needle in two similar points of the terrestrial globe.

This phenomenon, already proved by observations made on the spot, must be identical in the Antarctic regions.
Thus, then, there did exist a magnet of prodigious intensity in the zone of attraction which we had entered.