388 
APPENDIX. 
A. 
Sect. VII. 
Reefs. 
E. Coast. 
North 
Coast. 
N. West 
Coast. 
Group; the westernmost islet is in 17° 39', and 151° 27' 
(149° 7' East of Paris), and appeared to terminate the 
group. As it was near sunset, the vessels hauled to the 
wind for the night, and at daylight bore up on a north 
course : soon afterwards they saw an islet W.N.W. ; they, 
however, continued to steer North until eight o’clock, and 
then, having run nine miles, saw another island N.N.E. On 
attempting to steer between the isles, they were found to be 
connected, and having sounded in eleven fathoms, the vessels 
bore up, and steered between the westernmost islet and two 
extensive reefs, through a passage five or six miles wide, 
that appeared to be clear. 
The westernmost islet is in 17° 42' S., and 150° 43' E., 
(148° 23' East of Paris), and the westernmost reef, in 
17° 44' S., and 150° 32' E., (148° 12' East of Paris). A 
space of ten or twelve leagues between Governor Farquhar’s 
Group and that seen the preceding day was passed in the 
night, and probably may contain other reefs. The last group 
was named Tregrosse’s Islets. 
The Alert struck on a shoal to the westward of Torres’ 
Strait in 1817 ; it seemed to be about two hundred fathoms 
in length, and about fifty yards broad: it is in latitude 
9° 52', and longitude 140° 50'. 
In the vicinity of Cape Van Diemen there are many sub- 
marine coral banks, that are not yet shoal enough to be 
called reefs ; that which Captain Flinders saw, and sounded 
upon in seven fathoms, lies in 9° 56' latitude, and 129° 28' 
longitude. The Alert also passed over a shoal patch with 
nine fathoms in 10° 1' S., and 129° 8' E. 
SAHUL BANK is but very imperfectly known, 'and its 
extent by no means so large as is laid down upon the 
chart. In that interval, however, there are probably many 
