James Cook - A Journal of the proceedings of His Majesty's Bark Endeavour on a voyage round the world, by Lieutenant James Cook, Commander, commencing the 25th of May 1768 - 23 Oct. 1770 - Page 327
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Passage from Endeavour Strait to New Guinea
Aug 1770. which is that there is only one high tide in 24 hours & that is the night tide, on the Spring tides the difference between the perpendicular rise of the night & day tide is not less than 3 feet which is a great deal where the tides are so inconsiderable as they are here. this inequality of the tide I did not observe 'till we run ashore perhaps it is much more so to the Northward than to the Southward . After we had got within the reef the second time we found the tides moe considerable than at any time before except in the Bay of Inlets it may be owing to the water being confined in channels between the shoals here the flood always sets to the NW to the extremity of New Whales from thence W. & SW. into the India Seas.
Friday 24th. In the pm had light airs from the SSW. with which after leaving Booby Island as before mentioned we steer'd WNW. until '5'oClock when it fell calm & the the tide of ebb which sets to the NE. soon after making we anchor'd in 8 fa.m soft sandy bottom, Booby Island bearing So.50E distant 5 miles. Prince of Wales Isles extending from NEbN to S55°E there appeard to be an open clear passage between these islands extending from N.64°E to EbN at 1/2 past 5 in the morning in purchased the anchor the cable parted about 8 or 10 fa.m from the anchor. I immediately order'd another anchor to be let go which bro.t the ship up before she had drove a cables length from the buoy. after this we carried out a kedge & warped the ship near to it. & then endeavour'd to sweep the anchor with a hawser but missed it & broke away the buoy rope we made several attempts afterwards but did nor succeed . while the boats were thus employ'd we hove up the kedge anchor it being of no more use. At noon Lat.de observed 10°30'So. winds at NE. a fresh breeze the flood tide here comes from the same quarter.
Saturday 25th.Winds at NE. & ENE. a gentle breeze being resolved not to leave the anchor behind while there remain'd the least probability of getting of it After dinner I sent the boats again to sweep for it first with a small line which succeeded & now we know'd where it lay we found it no very hard matter to sweep it with a hawser. this done we hove the ship up to it by the same hawser but just as it was almost up & down the hawser dip'd & left us all to do over again. by this time it was dark & obliged us to leave off until day light in the morning when we sweep'd it again & hove it up to the bows & by 8 oClock weigh'd the other anchor, got under sail & stood away NW having a fresh breeze at ENE. at noon we were by observation in the Lat.de of 10°:18'So. long.de 219°:39'W. having no land in sight but ab.t 2 miles to the Southw.d of us lay a shoal on which the sea broke & I believe a part of it dry at low water. it extended NW & SE & might be ab.t 4 or 5 Leag.s in circuit, depth of the water at this time