This is an excellent passage. It appears to be a great object in making a passage from India to England, to pass the Cape without going in; for it is often easy to round the Cape and go to St. Helena, when it is difficult and tedious either to go to Simon's or Table Bay, and much delay is produced by the difficulty of getting out of the former anchorage. * * * * * 16. [Sidenote: St. Helena to Ireland, 1800 leagues.] From St. Helena to Bantry Bay in Ireland. Sailed from St. Helena on the 14th August, 1817. Arrived off Bantry Bay, 14th October, 1817 61 days. This passage was unusually long, owing to a succession of hard gales from north-east to south-east, which we encountered in latitude 47º north, longitude 13º west, beginning on the 27th of September, and continuing, with little intermission, till the 8th of October; after which period the weather became fine, but the wind hung constantly to the eastward, so as to render it difficult to fetch Ireland. GEOLOGICAL MEMORANDUM; BEING A DESCRIPTION OF THE SPECIMENS OF ROCKS COLLECTED AT MACAO AND THE LADRONE ISLANDS, AND ON THE SHORES OF THE YELLOW SEA, THE WEST COAST OF COREA, AND THE GREAT LOO-CHOO ISLAND. GEOLOGICAL MEMORANDUM. It is greatly to be regretted, that, during this voyage, our means of gaining information on this interesting subject were so limited. In China we were restrained, sometimes by the jealousy of the Chinese, and sometimes by an apprehension on our part of giving offence, or of exciting suspicion, by following up enquiries, the nature of which it was impossible to explain when interrogated by the inhabitants. On the coast of Corea, the still greater jealousy of the natives rendered it impossible to prosecute geological investigations beyond the beach. Both in China and on the coast of Corea our stay at each place was very short, and our time being often necessarily occupied by avocations foreign to such enquiries, many opportunities were lost merely for want of time. Even at the Great Loo-choo Island, where we remained much longer, our researches were confined to a coast which offered nothing interesting. Having therefore nothing of a general or striking nature to offer to the scientific world on this subject, I shall merely give an account of the specimens collected at the various places which we touched at during this voyage, accompanied by brief explanations from memorandums made on the spot. The geologist will be struck with the resemblance which the rocks in this remote quarter of the globe bear to those with which he has been familiarly acquainted. SPECIMENS FROM CHINA. MACAO. 1. Granite, composed of white quartz, porcelain clay, and greenish steatite, with veins of white quartz intersecting each other. 2. Fine-grained granite, composed of yellowish feldspar, white quartz, and black mica. Quartz dykes of great magnitude traverse the granite which forms this peninsula.