Through the isthmus of central America only, a short, safe, and easy passage from Europe to the eastern parts of Asia and the Pacific Ocean, can be effected. That a passage over the Pole exists, is extremely probable, nay, it may be said, is certain. This passage, when found, will be obtained by standing north between Nova Zembla and Spitzbergen, and thence over the Pole, inclining first eastward above Europe, and thence westward for some distance, to Behring's Straits. But admitting that there is a passage open by this route, it can only be so from the end of May to the middle of September, and during this period only comparatively safe; a period much too short to accomplish a voyage out and back from China, and scarcely sufficient to perform the voyage out and back between Great Britain and her territories on the west coast of America situated to the north of Columbia River. Moreover, even if a passage this way was open for a period sufficient to enable the navigator to accomplish the voyage to either of the quarters alluded to, still it will appear, when the distances come (p. 084) to be noticed and contrasted, that, considering the winds and the weather which ships would encounter in passing over the North Pole into the Pacific, as contrasted with those which they would most certainly meet with in sailing westward through tropical seas, by the Isthmus of America; that the latter route would, upon the whole, be the best, and in all respects preferable and most expeditious.