Arrival at Endeavou'r Streichts. 135 
from N. E. to S. W. is ten leagues, and is about five leagues 
broad, except at the north eait entrance, where it is Some- 
what lefs than two miles, being contracted by the iflands 
which lie there. That which I called PofTeffion ifland is of a 
moderate height and circuit, and this we left between us and 
the main, palling between it and two Small round illands, 
which lie about two miles to the N. W. of it. The two Small 
illands, which I called Wallis’s illands, lie in the middle of 
the South welt entrance, and thefe we left to the Southward. 
Our depth of water in the ftreight, was from four to nine fa- 
thom, with every where good anchorage, except upon the 
bank, which lies two leagues to the northward of Wallis’s 
Iflands, where, at low water, there are but three fathom : for 
a more particular knowledge of this llreight, and of the Situa- 
tions of the Several iflands and Ihoals on the eaflern coafl: of 
New Wales, I refer to the chart ; yet with refpeCt to the 
Ihoals, I cannot pretend that one half of them are laid 
down, nor can it be fuppofed poflible that one half of them 
fhould be discovered in the courSe of a Angle na- vigation : 
many iflands alfo mult have efcaped my pencil, efpecially 
between latitude 20° and 2 2°, where we faw iflands out 
at fea as far as an ifland could be diftinguilhed ; it 'mult 
not therefore be fuppofed, by future navigators, that where 
no fhoal or ifland is laid down in my chart, no flioal nor ifland 
will be found in thefe Seas : it is enough that the Situation of 
thofe that appear in the chart is faithfully ascertained, and, in 
general, I have the greatell reafon to hope that it will be 
found as free from error as any that has not been corrected by 
Subsequent and fucceflive obfervafions. The latitudes and 
longitudes of all, or molt of the principal head lands and bays, 
may be confided in, for we Seldom failed of getting an obser- 
vation once at leaft every day, by which to correCt the lati- 
tude of our reckoning, and observations for fettling the lon- 
gitude were equally numerous, no opportunity that was of- 
fered by the Sun and moon being Suffered to eScape, It would 
be injurious to the memory of Mr: Green, not to take this 
opportunity of attefting that he was indefatigable both in 
making observations and calculating upon them j and that, by 
his inflruClions and afliftance, many of the petty officers were 
enabled both to obferve and calculate with great exa&nefs. 
This method of finding the longitude at fea, may be put 
into univerSal praCIice, and may always be depended upon 
within half a degree, which is Sufficient for all nautical pur- 
poSes. If, therefore, obferving and calculating were confi- 
dered as neceflary qualifications for every fea officer, the la- 
bour of the Speculative theorift to Solve this problem might be 
remitted, without much injury to mankind ; neither will it 
M2 be 
