INTRODUCTION. Xiil 
In the course of the voyage, several changes 
occurred among the officers, which it may be well 
to mention here. 
In September, 1826, Lieutenant Hawes inva- 
lided: and was succeeded by Mr. R. H. Sholl, the 
senior mate in the Expedition. 
In February, 1827, Mr. Ainsworth was unfortu- 
nately drowned; and, in his place, Mr. Williams 
acted, until superseded by Mr.S.8. Flinn, of the 
Beagle. 
Lieutenant Cooke invalided in June, 1827 ; and 
was succeeded by Mr. J. C. Wickham. 
In the same month Mr. Graves received infor- 
mation of his promotion to the rank of Lieutenant. 
Between May and December, 1827, Mr. Bowen 
and Mr. Atrill invalided; besides Messrs. Lunie, 
Jones, and Macdouall: Mr. W. Mogg joined the 
Beagle, as acting Purser; and Mr. D. Braily, as 
volunteer of the second class. 
Mr. Bynoe acted as Surgeon of the Beagle, after 
Mr. Bowen left, until December, 1828. 
In August, 1828, Captain Stokes’s lamented 
vacancy was temporarily filled by Lieutenant Sky- 
ring ; whose place was taken by Mr. Brand. 
Mr. Flinn was then removed to the Adventure ; 
and Mr. A. Millar put into his place. 
