BY A. MAULT. 113 



Meliance, round Van Diemen's Land, was made in the colonial 

 sloop Norfolk of Port Jackson. The position of Port Dalrymple 

 is fixed by 6 sets of lunar distances, taken in each direction 

 with 2 sextants. The rest of the northern and western 

 coast have been traced by estimates corrected by observations 

 along the coast ; but on arriving at South-west Cape our 

 longitude, compared with that deduced from Cook's 

 observations, was only 3min. in error. This error seemed to 

 us so small that we changed nothing in the chart we had 

 made. Adventure Bay is copied from the plan of Captain 

 Cook (8th Edition, Dublin), Swilly Eock or Pedra Blanca is 

 placed 59min. of longitude to the east of South-west Cape, 

 according to the table in Cook's voyage, which agreed with 

 the observations we made. The east coast, where shown by a 

 simple line without shading, is traced from Captain Furneaux, 

 and copied from a chart of New South Wales, of which the 

 scale was about an inch to the degree of longitude. The 

 shaded part of the coast in the neighbourhood of Oyster 

 Bay is copied from a plan of 7in. to the deg. made by J. H. 

 Cox and published by Mr. Dalrymple in 1791. The details of 

 the south-east part of Yan Diemen's Land are taken from a 

 manuscript plan made by Mr. J. Hayes, who visited that part 

 in a ship called the Biike, sent out from Bengal. We cannot 

 answer for their exactitude. Henshaw's Bay and Cape 

 Hanson of his chart are Frederic Henry Bay and Cape 

 Pillar, of which we have restored the names in this : we have 

 also made some slight changes in the names of points 

 surveyed from the sloop : the ports and bays of his chart 

 were called coves, and the rivers creeks. 



" The coast of New South Wales from Port Jackson to 

 Western Port was surveyed by Mr. Bass in a whaleboat. The 

 shaded parts are copied from a sketch he made of it by sight. 

 The cape called Eam's Head having been placed in the 

 position fixed by Cook and taken as a datum point, the long 

 coast beyond it has been extended further than shown in the 

 sketch, in order to place Cape Wilson in the position it ought 

 to have relatively to Furneaux Islands. Little confidence 

 can be placed in estimates of courses made in waters like 

 these, where there are strong currents, and it is only by 

 estimate that these points have been fixed. The islands 

 were placed by Captain Furneaux eastward of their real 

 position : they have been marked here after the observations 

 made at Port Dalrymple and the estimated course from that 

 Port to the Swan Islands. 



" The beginning and end of an eclipse of the moon, observed 

 at the east end of Preservation Island, gave 148deg. 37min. 

 SOsec. of east longitude from Greenwich, 148deg. (146deg.) 

 17min. SOsec. east of Paris." 



Then follow the symbols giving the various routes ; after 



