STUDY XI. 163 



** fertioir of the Cafres. In order to get down, 

 " you muft return by the fame way that you 

 " afcended, unlefs you choofe to run the rifk of 

 " another path, which is very rough, and dange- 

 " roully fteep. 



<{ From the plain of the Cafres may be feen the 

 ** mountain known by the name of Trots Salafes> 

 " from the three points of that rock, the loftieft 

 " in the Ifland of Bourbon. All it's rivers iffue 

 " from thence, and it is fo fteep on every fide, that 

 <e there is no poffibility of climbing it. 



" There is, befides, in this ifland, another plain, 

 " called the Plain of Silaos, higher than that of 

 " the Cafres, and of no greater value : it is ex- 

 " tremely difficult to get up to it." 



In the lively defcription of our Traveller, we 

 muft overlook fome errors in Phyfics, fuch as his 

 affigning to the Plain of the Cafres an elevation of 

 two leagues above the Horizon. He had not 

 learned from the barometer and thermometer, that 

 there is no fuch elevation on the face of tfye Globe, 

 and that, at the perpendicular height of one league 

 only, the freezing point is invariable. But from 

 the thick fog which furrounds thofe peaks, from 

 that continual mift which wets as much as rain, 

 and which falls during the night, it is evidently 

 m 2 perceptible, 



