Sir I receiued your letters the 19. of Iune: it grieued me much that vpon the sight of them the time being spent, I could not giue any conuenient instructions: I wish Arthur Pet had bene informed before his departure of some special points. The voyage to Cathaio by the East, is doutlesse very easie and short, and I haue oftentimes marueiled, that being so happily begun, it hath bene left of, and the course changed into the West, after that more then halfe of your voiage was discouered. For beyond the Island of Vaigats and Noua Zeembla, there foloweth presently a great Baie, which on the left side is inclosed with the mightie promontorie Tabin. [Sidenote: A great gulfe is beyond Vaigats, whereinto mighty riuers descend.] Into the mids hereof there fall great riuers, which passing through the whole countrey of Serica, and being as I thinke nauigable with great vessels into the heart of the continent, may be an easie means whereby to traffique for all maner of merchandize, and transport them out of Cathaio, Mangi, Mien, and other kingdoms thereabouts into England. But considering with my selfe that that nauigation was not intermitted, but vpon great occasion, I thought that the Emperor of Russia and Moscouie had hindered the proceeding thereof. [Sidenote: The best course to be taken in discoueries.] If so be that with his grace and fauour a furthur nauigation may be made, I would counsell them certainly not first to seeke out the promontorie Tabin, but to search this baie and riuers aforesayd, and in them to picke and chuse out some conuenient port and harborough for the English merchants, from whence afterward with more opportunitie and lesse perill, the promontorie Tabin and all the coast of Cathaio may bee discouered. 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.