Page:Captain Cook's Journal during His First Voyage Round the World.djvu/394

316 are also 2 Small low Islands, called Wallice's Isles, laying in the Middle of the S.W. entrance, which we left to the southward; the depth of Water we found in the Straits was from 4 to 9 fathoms. Every where good Anchorage, only about 2 Leagues to the Northward of Wallice's Islands is a Bank, whereon is not more than 3 fathoms at low Water, but probable there might be found more was it sought for. I have not been particular in describing this Strait, no more than I have been in pointing out the respective Situations of the Islands, Shoals, etc, on the Coast of New Wales; for these I refer to the Chart, where they are deliniated with all the accuracy that Circumstances would admit of.

With respect to the Shoals that lay upon this Coast I must observe, for the benefit of those who may come after me, that I do not believe the one ½ of them are laid down in my Chart; for it would be Absurd to suppose that we Could see or find them all. And the same thing may in some Measure be said of the Islands, especially between the Latitude of 20° and 22°, where we saw Islands out at Sea as far as we could distinguish any thing. However, take the Chart in general, and I believe it will be found to contain as few Errors as most Sea Charts which have not undergone a thorough correction. The Latitude and Longitude of all, or most of, the principal head lands, Bays, etc, may be relied on, for we seldom fail'd of getting an Observation every day to correct our Latitude by, and the Observation for settling the Longitude were no less Numerous, and made as often as the Sun and Moon came in play; so that it was impossible for any Material error to creep into our reckoning in the intermediate times. In justice to Mr. Green, I must say that he was indefatigable in making and calculating these observations, which, otherwise must have taken up a great deal of my time, which I could not at all times very well spare; not only this, but by his instructions several of the petty Officers can make and calculate these observations almost as well as himself. It is only by such Means that this method of finding the Longitude at Sea can be put into universal practice; a Method that we have generally found may be depended upon within ½ a degree, which is a degree of Accuracy more than sufficient for all Nautical purposes. Would