84 COMMENCE THE SURVEY. 



May 2Qth. — During* the forenoon^ the ship was 

 moved over to an anchorag'e under the lee (N.W. 

 side) of Dunk Ishmd^ where we remained for ten 

 days. The survey of the coast line and Inner 

 Passag'e to the northward was here commenced, 

 and afterwards continued up to Torres Strait^ h}^ 

 an unhroken series of triang'ulation ; it included a 

 space var^dng- in width from 5 to 15 miles^ extend- 

 ing' throug'h 7^ degrees of latitude and 4^ of long'i- 

 tude^ with a coast line of upwards of GOO miles. 



The programme of the survey may be briefl}^ 

 given as follows : — at the principal stations — 

 chiefly islands off the coast — the various observa- 

 tions for determining- astronomical positions and 

 theodolite ang'les^ were made by Captain Stanle}^ and 

 Mr. W. H. Obree^ and the ship remained there at 

 anchor for several days. Meanwhile^ Lieut. Da}^- 

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

 neighbourhood as far as the next station twenty or 

 thirt}^ 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. Heathy 

 Avhile 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 



