liv INTRODUCTION* 



advantage- which an able aftronomer might 

 have obtained for the fafety of navigators. 

 1 here fpeak from a thorough knowledge of 

 the fubjedt. The colledioa of charts of 

 the Ifle of France is full of notes written 

 hy my band, hi which Ji clearly prove that 

 lie has confounded Artove with Agalega, 

 and Cargados with St. Brand on > though 

 among his papers he had various plans of 

 tbtfe flioals and iflands ; and that he has . 

 committed a mtiltitiide of other errors Icfs 

 Unking, but f^ill of great importance. I 

 have indeed reflified them as far as I was 

 able; for in oVjt*£ts, which fo eOentially 

 concern the fafety of navigators, one ought 

 not, through private confiderations, to with^ 

 hold or delay any thing that* may tend to 

 improve hydrography. But if I have.treat€d 

 d'Apres with too mueh fcverity, 1 have 

 always paid a juft tribute of applaufe to his 

 ^teal, apd his confiant defire- of rendering 



his 



