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SURVET OF THE INTERTROPICAL 
1821. paper, but bore a very great depreciation ; the 
Sept. 27. premium upon bills of exchange upon Europe, 
at the time of our departure, was as much as 
66 to 76 per cent., and upon silver coin there 
was a depreciation of 45 per cent. 
On the voyage to this place, three charts of 
the north-west coast were reduced and copied by 
Mr. Roe, and were forwarded to the Admiralty 
by H. M. Sloop Cygnet, together with a brief 
account of our voyage, from the time that we 
parted company with the Dick, off Cape Van 
Diemen. 
No observations were taken at this place, ex- 
cepting for ascertaining the rates of the chrono- 
meters, and for the variation and dip of the 
magnetic needle : the former being 12° 31' West, 
and the latter 51° 42' 1". The situation of the 
observatory has been long since fixed by the 
Abbe de la Caille, in 20° 10' South latitude, and 
57° 29' East longitude. 
I cannot conclude this very brief account of 
our visit to Mauritius, without expressing my 
acknowledgments for the civilities and hospita- 
lity we received from our countrymen at Port 
Louis, particularly from His Excellency Sir Ro- 
bert T. Farquhar, Bart, who so long and ably 
presided as Governor of the Island; and for 
