P 0 ST SCRIPT. 



WE have noted in this Author, fag. 278. a Defire to 

 depredate the Sea-Chart of Mr. Halley, made to 

 fliew the Variations of the Compafs, as not rightly rcpre- 

 fenting the Situation of the Coaft of Peru and Chili. Whe- 

 ther the finglc Reckoning of the Ship Mary- Ann of Marfeilles 

 be fufficient to determine this matter, is fubmitted to the 

 Reader's Judgment : But whatever ground there may be 

 for this Exception, (in a matter wherein Halley pretends to 

 no Knowledge of his own, but only to have followed the 

 beft Accounts he could at that time procure) yet as to his 

 other Cavil, £.291. he is fully affured that M. Frezier is 

 under a grofs miftake, when he affirms that thelfland of^f- 

 fcenfion and Trinidad, in the Lat. of about 2 o Degrees South, 

 are two different Iflands ; and in that refpeft givps the Pre- 

 ference to the old Dutch Charts. Mr. Halley knows, by 

 the Defcription given of it, that thelfland at which M. Fre- 

 zief touched, and which by him is call'd Afcenfion, is the 

 very fame he calls 'Trinidad; and he is certain to Demon- 

 ftration, that to the Eaftward of this Ifland there are no 

 others to be found, except the three Iflets, or rather Rocks, 

 which are but about 7 or 8 Leagues to Windward thereof, 

 and which having been feen from the Eaft, have by fome 

 been named the Ifles of Martin Vaz. He affirms that in the 

 Year 1700, he kept the Parallel of 20 Degrees, 20 Minutes 

 Soutti,witha Weft Courfe, for above 200 Leagues to the 

 Eaftward of this place, and met with* no Land, or Sign 

 of Land, by Birds or otherwife, till he firft made the faid 

 three Rocks, which lie nearly in a Line North and South, 

 and are not above a Mile afund^r, the middlemoft being 

 the biggeft, the other two very fmall,and the Southermoft 



very 



