PREFACE. 
XI 
land-charts I have ever seen. It may not be amiss to subjoin the difterence 
in latitude of these eastern points, as they appear in some of the charts, 
and their real position as ascertained by repeated actual observations, which 
I had the opportunity of making with a good sextant. 
Keiskamma. 
Rio d'l 
Great F 
nfante, or 
sh River. 
Zwartkop's Bay. 
Neptune Oriental 
0' 
32' 
33° 
37' 
Actual Observations 
33 
12 
33 
25 
33 
56 
I 12 
■35 
Captain Riou 
32 
30 
33 
25 
33 
46 
Actual Observations 
33 
1 2 
33 
25 
33 
Errors 
42' 7niles 
10 
Sparrmann 
28 
1 2 
30 
0 
30 
57 
Actual Observations 
33 
12 
33 
25 
33 
56 
Errors 
5 
0 
3 
25 
2 
59 
Mr. Le Vaillant 
29 
42 
30 
44 
3^ 
54 
Actual Observations 
33 
12 
33 
25 
33 
56 
Errors 
3 
30 
2 
41 
2 
2 
With regard to the last-mentioned gentleman, I should not have noticed 
his map had he not endeavoured to impress the world with an idea of the 
great pains that were taken in collecting the materials, and of the assist- 
ance he afterwards received, and the attention that was bestowed, in put- 
ting them together. And in order to add force, as he supposes, to the 
value of his observations, with a pretended zeal for the cause of humanity 
(pretended because he knew that every line in his chart was false) he 
breaks out into the following apostrophe : — " Had my voyage been pro- 
" ductive of no other good than that of preventing a single shipwreck 
