The tides are more considerable at these islands, than at any other of my discoveries in this ocean, that lie within the tropics. At Annamooka it is high water, on the full and change days, nearly at six o’clock; and the tide rises and falls there, upon a perpendicular, about six feet. In the harbour of Tongataboo, it is high water, on the full and change days, at fifty minutes past six. The tide rises and falls on those days, four feet nine inches; and three feet six inches at the Quadratures. In the channels between the islands, which lie in this harbour, it flows near tide and half-tide; that is, the flood continues to run up near three hours, after it is high water by the shore; and the ebb continues to run down, after it is flood by the shore. It is only in these channels, and in a few other places near the shores, that the motion of the water or tide is perceivable; so that I can only guess at the quarter from which the flood comes. In the road of Annamooka, it sets west south-west, and the ebb the contrary; but it tails into the harbour of Tongataboo from the north-west, passes through the two narrow channels, on each side of Hoolaiva, where it runs with considerable rapidity, and then spends itself in the _lagoon_. The ebb returns the same way, and runs with rather greater force. The north-west tide is met at the entrance of the _lagoon_, by one from the east; but this, as I have before observed, was found to be very inconsiderable. END OF THE FIFTH VOLUME. LONDON: Printed by A. & R. Spottiswoode, New-Street-Square. Footnotes Footnote 1: Two voyages for discovering a North-West passage, through Hudson’s Bay, were then performed; one under the command of Captain Middleton, in his Majesty’s ships the Furnace, and the Discovery Pink, in 1741 and 1742; the other under the direction of Captains Smith and Moore, in the ships Dobbs and California, fitted out by subscription, in 1746 and 1747. Footnote 2: Captain, now Admiral, Byron had under his command the Dolphin and Tamer. He sailed in June, 1764, and returned in May, 1766. Footnote 3: Captain Wallis had under his command the Dolphin and Swallow. He sailed in August, 1766, and returned, with the Dolphin, in May, 1768. Footnote 4: The Swallow, commanded by Captain Carteret, having been separated from Wallis, and, by keeping a different route, having made different discoveries, this may be considered as a distinct voyage. The Swallow returned to England in March 1769. Footnote 5: Captain Cook, in the Endeavour, sailed in August 1768, and returned in July, 1771. In his second voyage, he had the Resolution and Adventure under his command. They sailed from England in July, 1772, and returned on the 30th of July, 1775. Footnote 6: