444- BLACK REEF. 



part of Franklin Channel are not so sheltered as those 

 between Barren and Clarke Islands. The latter has 

 two rounded summits, the highest 690 feet, resem- 

 bling a saddle, either from west or east. The rugged 

 peaks of Strzelecki, reaching an elevation of 2,550 

 feet, rise immediately over the northern point of 

 the west entrance of Franklin Channel. 



The north-east extreme of Tasmania is singularly 

 low, with a coast-line of sand hills. Out of this 

 level tract rise Mounts William and Cameron ; the 

 latter, 1,730 feet high, is the highest of a group of 

 peaks, cresting a ridge, whilst the former is a soli- 

 tary pyramidal hill, 730 feet high, used as a guide for 

 craft in working through the strait. When it bears 

 S. by W., vessels may close with the south shore, 

 being then past the Black Reef,* and the rocks that 

 lie off the coast to the eastward, as far as Eddystone 

 Point. The most outlying and remarkable are the St. 

 George's Rocks, a cluster of grey granite boulders, 

 66 feet high ; a patch of moored kelp, however, on 

 which the water sometimes breaks, lies three 

 miles E.S.E. from the Black Reef. The principal 

 danger on the northern side of the eastern entrance 



* This reef is a low, dark, rocky islet, with reefs extending off 

 N. 45° W. three quarters of a mile, and S. 56" E., one mile. 

 There is a passage of 7 fathoms, a mile wide, between it and the 

 main, through which the highest St. George's Rock, bearing S. 

 52o E., leads. Black Reef bears from the latter N. 45o W., six 

 miles and a half, and from the summit of Swan Island, S. 53o E., 

 eight miles and three-quarters. Mount William, also, bears from 

 it S. 22o \V. 



