To His Grace 



JOHN Duke of Marlborough, Marquefs 

 of Blanford> 2w/ 0/ Marlborough, Baron 

 Churchill of Sandridge, and Lord Churchill 

 of Ay mouth in Scotland, Captain-General of 

 Her Majeftys Forces, Mafier-General of the 

 Ordinance^ Her Majeftys Ambajfador Ex- 

 traordinary to the States-General, One of 

 Her Majeftys mo ft Honourable Tr ivy -Coun- 

 cil, and Knight of the moft Noble Order 

 of the Garter. 



May it pleafe Tour Grace, 



TH E enfuing Treatife, is a Second Edition of 

 my Account of the IJlhmus of Darien, with 

 Additions ; which I publifli at this Time, 

 not fo much becaufe the firft Impreffion is wholly 

 fold off, as chiefly to give Occafion to the Miniftry 

 (whereof your Grace holds no fmall Share) to 

 think of making a Settlement on one of the moft va* 

 luable Spots of Ground in the World, thereby ei- 

 ther to enhaunce a Part of the Mines, which are 

 lodg'd in its Bowels, or entirely to baniih thence 

 the Enemy, who is now poffefs'd of them \ befides, 

 that by fuch a Settlement, a free Paffage by Land 

 from the Atlantick to the South-Sea might eafily be 

 effe&ed, which would be of the greateft Confe* 

 quence to the Eali-India Trade, 



Tk;i 



