192 
A VOYAGE TO [North Coast. 
isos, peculiar attraction, or from some oversight in taking the amplitude, 
J “” r - I cannot determine ; if from the latter, it would appear that the 
variation is a degree and a half less on the south-west, than on the 
east and north sides of Groote Eylandt, 
Scarcely any run of tide was perceptible in North-west Bay , 
nor did the rise appear to exceed four or five feet at any part of the 
island, though it runs with some strength off the projecting points. 
The irregularity in different places was such, that the time of ig 
water could not be ascertained ; but I think there is only one fu 
tide in the day, and that the flood comes from the northward. 
Early on the 17th we worked out of the bay, and stretched 
Monday IT- gga with a W N. W. wind ; at noon the latitude was 13° 27' 
10", and the furthest extreme of Chasm Island bore S. 26 W. 
After a calm in the afternoon, the sea breeze came in, and we 
steered south-westward till nine o’clock ; when a bower anchor was 
let go in 14 fathoms, two or three miles from the north end of Wm- 
Tuesday is. chilsea Island. In the morning we lay up south-west, on the star- 
bord tack, and weathered the island, leaving a rock one mile and a 
half on the other side. I wished, by a good bearing of Connexion 
Island to join the survey completely round Groote Eylandt ; and at 
nine o’clock it was set at S, 27? to 47° W„ two leagues The 
wind then came a-head, and we tacked towards two small isles, 
where the anchor was dropped at ten, one mile and a half from 
their south side, in 1 6 fathoms, sand and shells. Our latitude here 
was 13 0 43' 42" south, and the east side of Connexion Island bore 
S. W. six or seven miles; the difference of longitude from our 
situation on the 5th at three p. m., was hence ascertained to be 
55 " east, not differing 5" from what was given by No. 543, but 
No. 520 showed 6i' too much ; the differences of longitude by the 
former time keeper alone have therefore been used round Groote 
EyIan i went immediately, with the botanical gentlemen, to the 
northern and largest of the two sandy isles ; and after observing 
