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LIEUT. C. DRINKWATER. 



merits of this rising young officer^ to whose assist- 

 ance and companionship, in every pursuit connect- 

 ed with nautical science, I stand essentially in- 

 debted : and it is with real satisfaction, on public 

 as well as private grounds^ that I observe his pro- 

 motion to the rank of Lieutenant, his admission into 

 the Royal Society, and his appointment as Surveyor 

 to the North- West Expedition about to sail. 



The chart published herewith was drawn up un- 

 der my directions, and from Mr Foster's observa- 

 tions, by Lieutenant A. B. Becher of the Conway, 

 from whose practical skill in hydrography, as well as 

 other branches of his profession, I derived much va- 

 luable assistance. 



I owe my acknowledgments also to Lieutenant 

 Charles Drinkwater, then midshipman of H. M, S. 

 Creole, for his assistance in our endeavours to bring 

 the higher branches of nautical astronomy into prac- 

 tical use. His zeal, his talents, and his intimate 

 knowledge of the subject in all its stages, rendered 

 his co-operation, at stations distant from ours, of the 

 highest utility. 



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