INTRODUCTION. xvl i 



instructions of the Department, and I must acknowledge and return my thanks 

 to him for the aid he afforded me in the arduous duties that devolved upon me. 



To Lieutenant Cadwalader Ringgold, the commander of the Porpoise, I am 

 indebted, for his hearty co-operation in the duties that devolved upon the Expe- 

 dition. The efficient manner in which he at all times held his command, and 

 the promptness with which he carried out the duties assigned him, merit my 

 warmest acknowledgments and thanks. 



The best encomium I can bestow on the united efforts of the officers and men, 

 is to refer the reader to the Hydrographical Atlas, and the details in the Narra- 

 tive of the duties which have been performed. 



In the observatory duties and pendulum observations, I was principally 

 assisted by Lieutenant Carr, Passed Midshipmen Eld and Blunt, and Mr. Howi- 

 son. I deem it my duty to speak of the devotedness of Assistant-Surgeons Fox 

 and Holmes, who, besides attending to their engrossing medical duties and 

 meteorological observations, manifested the utmost zeal in collecting and making 

 researches in the various departments of natural history. They also frequently 

 assisted in the surveys, and I found them ever ready to engage in any thing that 

 could promote the success of the Expedition. 



It gives me great pleasure to acknowledge the credit that is due, and the obli- 

 gations I feel under to Mr. R. R. Waldron and Mr. William Spieden, Pursers 

 attached to the Expedition, for their promptness in procuring the supplies, and at 

 all times forwarding the business of the Expedition; none of the departments of 

 the service were more efficient than that over which they had control. 



Since our return, Lieutenants Carr, Budd, Totten, and Eld, with Mr. F. D. 

 Stuart, who were attached to the Expedition, have been engaged under my 

 direction in recalculating and revising our numerous surveys, previous to their 

 being engraved. 



To Messrs. Drayton and Agate, the Artists of the Expedition, I feel it due to 

 make known how constantly and faithfully they have performed their duties. 

 The illustrations of these volumes will bear ample testimony to the amount of 

 their labours, and the accuracy with which they have been executed. 



Mr. Drayton has had the management of the whole engraving department 

 assigned him by the Committee of the Library, and has accomplished what very 

 few believed could be done in this country. The distribution of the work among 

 the engravers has given general satisfaction, not only to the Committee, but to 

 the artists themselves, and has afforded a national encouragement to this 

 description of art, the benefit of which it will long continue to feel. 



vol. i. c 



