476 THE GLENNIE ISLES. 



island two miles long, trending north and south, 

 with a hollow in the centre, forming a saddle, 

 the highest part being 450 feet high. It is the 

 northernmost of a group called the Glennie Islands, 

 fronting the south-western face of the Promontory ; 

 and is strewn over with blocks of granite, which give 

 it a castellated appearance. We did not find this 

 anchorage very good, the depth being 20 fathoms, 

 and the bottom sand over rock. Three small islets 

 lie close to the south-west point, and a reef extends 

 a cable's length off the northern. There is a passage 

 nearly four miles wide, and 23 fathoms deep, between 

 this part of Glennie's Group and the Promontory. 

 The singular break in the high land on the latter, 

 bearing E. ^ N. is a distant guide to the anchorage, 

 in which the flood tide sets to the northward, and 

 when aided by the current, attains a strength of a 

 knot and a half; the time of high water, is a 

 quarter of an hour later than at Refuge Cove. 



forcing the water into the river. The tides flow oh. 50m., and 

 ebb 6h. 25m , with a velocity varying from two to five miles an 

 hour, according as the river is confined or open. The ebb 

 stream setting round Low Head into the bay to the eastward, is 

 apt to drift vessels in that direction. Three miles in the offing 

 the flood stream runs from one to two knots to the W.N.W. 



The position of the lighthouse on Low Head is as follows : 

 lat. 41° 03' 26" S., long. 4" 25' 44'' W., of Sydney; or 146° 50' 

 16" E, of Greenwich, variation 10° 05' easterly. The light 

 is elevated 140 feet above the sea level, and may be seen, in clear 

 weather, sixteen miles fro n the decks of small vessels, revolving 

 once in fifty seconds. 



