3. The origin of the considerable quantity of drift-wood, found in almost every part of the Greenland sea, is traced to some country beyond the Pole, and may be brought forward in aid of the opinion of the existence of a sea communication between the Atlantic and the Pacific; which argument receives additional strength from the circumstance of some of the drift-wood being worm-eaten. This last fact I first observed on the shores of the island of Jan Mayen, in August, 1817, and confirmed it by more particular observation when at Spitzbergen the year following. Having no axe with me when I observed the worm-eaten wood, and having no means of bringing it away, I could not ascertain whether the holes observed in the timber were the work of a _ptinus_ or a _pholas_. In either case, however, as it is not known that these animals ever pierce wood in arctic countries, it is presumed that the worm-eaten drift-wood is derived from a transpolar region. Numerous facts of this nature might be adduced, all of which support the same conclusion. 4. The northern faces of the continents of Europe and Asia, as well as of that of America, so far as yet known, are such as renders it difficult even to imagine such a position for the unascertained regions, as to cut off the communication between the Frozen Sea, near the meridian of London, and that in the opposite part of the northern hemisphere, near Behring’s Strait. 5. Whales, which have been harpooned in the Greenland seas, have been found in the Pacific Ocean; and whales, with stone lances sticking in their fat, (a kind of weapon used by no nation now known,) have been caught both in the sea of Spitsbergen and in Davis’s Strait. This fact, which is sufficiently authenticated, seems to me the most satisfactory argument.