262 VOYAGE OF THE POTOMAC. (Marcli, 
Shoalt (Karang Tahan), on east point, twelve feet ; Hoorn north- 
by-Mrest-quarter-west ; Kuiper nortliwest-by-west-balf-v^rest. Ryr 
gersdaal Bankt (Karang Carnal), on east point, nine feet ; Hoorn 
north-northeast-quarter-east ; Kuiper north-northw^est. The Arms 
of Purmerendt (Karang Djalan), on east point, thirteen feet 
eastern point of Hoorn north-by-east ; Rotterdam northwest. 
The rocks bearing west of the Island of Hoornf (Karang Poeloe 
Ayer), in the centre, twelve feet ; northern point of Hoorn east- 
half-south ; Rotterdam west-quarler-north. The Reef of Rotter- 
damt (Karang Poeloe Obie), in the centre, fifteen feet ; southern 
point of Hoorn east-three-quarters south ; western point of Onrust 
Kerkhof south-half-west. The Reef of Purmerendt (Karang 
Poeloe Sakiet), on southwest point, nine feet ; southern point of 
Purmerend north ; Kuiper west-northwest-quarter-west. The 
Stone of Onrustt (Karang Poeloe Kelor), on west point, nine 
feet ; Rotterdam north-northeast-quarter-east ; Kuiper southeast-- 
by-south. The Mathilda Rock* (Karang Prol), on northeast 
point, twelve feet ; southwestern point of the Kuiper southeast ; 
eastern point of Rotterdam northeast-three-quarters-north. The 
Reef of Onrust* (Karang Poeloe Kapal), on west point, nine 
feet. The two points of the reef bearing northwest of the Island 
of Kuiper* (Karang Poeloe Kuiper), on northwest point, nine 
feet ; the Reefs- of Onrust, and the two points of that bearing 
northwest of the Island of Kuiper, extend to the Islands of On- 
rust and Kiiiper. The Reef of Ontong Javaf (Tanjong Ontong 
Java), on north point, thirteen feet ; Haarlem east ; western point 
of Middelburg north-by-west. The Reef of Middelburgf (Ka- 
rang Poeloe Ramboet), on southeast point, fifteen feet ; and the 
same Reeff (Karang Poeloe Ramboet), on southeast point, fifteen 
feet; the coral reef on which these beacons are placed is connected 
with the island. The Wrange Rockf (Karang Sepat), on west point, 
twelve feet ; south point of Middelburg southeast-by-east-half- 
east ; Poeloe Dapoor northeast-half-north ; at a cable's length to 
the westward from this is another rock, eleven feet below the 
surface. The Myndert's Shoalf (Karang Gosson), in the centre, 
twelve feet ; Klein 'Kombuis northwest-quarter-west ; Poeloe 
Dapoor northeast-by-east. The Middle Rockf (Karang Loem- 
boeng), on southwest point, twelve feet ; Klein Kombuis northeast- 
by-north-half-east ; south point of the Great Kombuis northwest- 
