84 COMMENCE THE STJBVEY. 



May 2Uh. — During the forenoon, the ship was 

 moved over to an anchorage under the lee (N.W. 

 side) of Dunk Island, where we remained for ten 

 da} s. The survey of the coast line and Inner 

 Passage to the northward was here commenced, 

 and afterwards continued up to Torres Strait, hy 

 an unbroken series of triangxilation j it included a 

 space varying in width from 5 to 16 miles, extend- 

 ing through 7|- degrees of latitude and 4^ of longi- 

 tude, with a coast line of upwards of 600 miles. 



The programme of the survey may be briefly 

 given as follows : — at the principal stations — 

 chiefly islands off" the coast — ^the various observa- 

 tions for determining astronomical positions and 

 theodohte angles, were made by Captain Stanley and 

 Mr. W- H. Obree, and the ship remained there at 

 anchor for several days. Meanwhile, Lieut. Day- 

 man, in the Asp, laid down the coast line and 

 neighbourhood as far as the next station twenty or 

 thirty miles in advance. — Lieut. Simpson with the 

 pinnace continued the soundings several miles fur- 

 ther out, both working' in conjunction, and often 

 assisted by another boat in charge of Mr. Heath, 

 while the outside soundings devolved upon Lieut. 

 Yule, in the tender. The Rattlesnake in shifting 

 from place to place, aided by boats in company, 

 sounded the centre of the channel, usually following 

 one of the lines run by Captain P. P. King, and 

 marked upon his charts. The available boats per- 

 manently attached to the ship, were employed under 



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