And That There Is Such A Huge Promontorie Called Tabin, I Am Certainly Perswaded Not Onely Out Of Plinie, But

Also other writers, and some Maps (though somewhat rudely drawen:) and that the Pole of the Loadstone is not farre

Beyond Tabin, I haue learned by the certaine obseruations of the Loadstone: about which pole and Tabin I thinke there are very many rockes, and very hard and dangerous sailing: and yet a more hard and difficile passage I think it to bee this way which is now attempted by the West, for it is neerer to the pole of the Loadstone, to the which I thinke it not safe to approach. And because the Loadstone hath another pole then that of the world, to the which from all parts it hath a respect, the neerer you come vnto it, the more the needle of the Compasse doeth varie from the North, sometimes to the West, and sometimes to the East, according as a man is to the Eastward or to the Westward of that Meridian, that passeth by both the poles of the Magnes and the World.

This is a strange alteration and very apt to deceiue the Sailer, vnlesse hee know the vnconstancie and variation of the Compasse, and take the eleuation of the pole sometimes with his instruments. If master Arthur be not well prouided in this behalfe, or of such dexteritie, that perceiuing the errour he be not able to correct the same, I feare lest in wandering vp and downe he lose his time, and be ouertaken with the ice in the midst of the enterprise.

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