t 86 AVOYAGETO 



1780. between them, or to the Northward of the Roman Rocks, 



April. 



there is a fafe pafTage into the Bay. When the North Weft 

 gales are fet in, the following bearings will direct the mari- 

 ner to a fafe and commodious birth : Noah's Ark, South 51* 

 Eaft, and the centre of the hofpital South S3" Well, in 

 feven fathoms. But if the South Eaft winds have not done 

 blowing, it is better to ftay further out in eight or nine fa- 

 thoms. The bottom is fandy, and the anchors fettle con- 

 fiderably before they get hold. All the North part of the 

 Bay is low fandy land, but the Eaft fide is very high. 

 About fix miles Eaft of Noah's Ark lies Seal Ifland, the 

 South part of which is faid to be dangerous, and not to be 

 approached, with fafety, nearer than in twenty-two far 

 thorns. Off the Cape of Good Hope are many funk rocks, 

 fomc of which appear at low water ; and others have 

 breakers conftantly on them. 



The latitude of the anchoring-place in Si- 

 mon's Bay, by obfervation - - 34 20' South. 



The longitude - 18 29' Eaft. 



Dip of the South end of the magnetic needle 46 47' 



Variation of the compafs - - 22" 16' Weft. 



On the full and change days, it was high-water at $ h 55" 

 apparent time ; the tide rofe and fell five feet five inches ; at 

 the neap tides, it rofe four feet one inch. 



From the obfervarions taken by Mr. Bayly and myfelf, 

 on the nth of this month, when the Cape of Good Hope 

 bore due Weft, we found its latitude to be 34* 23' South, 

 which is 4' to the Northward of its pofiiion, as determined 

 by the Abbe de la Caillc. 



Having 



