MIDSUMMER ROCK MAIN POOLS ISLAND. 539 



Ice. — Greens Pond harbor freezes about Januarj' 18: it then is 

 closed at intervals nntil February 8, after which it is generally com- 

 pletely closed by ice about 2 feet in thickness until March 9; field 

 ice appears about March 11 and disappears about May 11. The first 

 vessel usually arrives about April 28, and the last leaves about 

 January 7. 



Midsummer rock bears 228°, distant a little more than ^ mile 

 from the southwestern point of Copper island, has 2 feet water over 

 it and a depth of 11 fathoms close-to. The western end of Greens 

 Pond island open westward of Maiden island, bearing 340°, leads 

 westward of the rock. 



Anchorage. — There is anchorage in fine weather between Maiden 

 and Greens Pond islands in 7 to 10 fathoms water. In proceeding 

 to it pass westward of Midsummer rock. 



The anchorage southward of Greens Pond island is indiiferent, and 

 as the bottom is chiefly rock with some patches of sand, care is neces- 

 sary in selecting suitable ground ; vessels should ride with a long 

 scope of cable. 



Pools harbor. — The entrance to this harbor, northward of Greens 

 Pond island, is between Partridge, Grassy, and Odd islands, on the 

 southwest, and Pools islands on the northeast. 



Sotith Pound islet, 17 feet high, lies north-northeastward nearly 

 a mile from Greens Pond island. A rock, with 2 fathoms of water 

 over it, lies southwestward nearly 200 yards from its western end. 



North Pound islet, northeastward i mile from South Pound islet, 

 is 30 feet high, and a reef, on which the sea generally breaks, extends 

 southwestward 400 j^ards from it. 



A rock, with 5 fathoms of water over it, bears 51°, nearly 800 yards 

 from North Pound islet. 



North rocks, bearing 50°, distant from ^'^ mile to 1^ miles from 

 the northeastern point of Newell island, are two rocky patches with 

 2 and 3 fathoms least water over them. 



Liver ledge, bearing 59°, distant nearly 2 miles from PufRn Island 

 lighthouse, has 7 fathoms water over it. 



Leading mark. — The summit of Big Pools island, in line with 

 the northeastern side of South Pound islet, bearing 305°, leads 600 

 yards northeastward of North rocks, and 550 yards southwestward of 

 Liver ledge. 



Big Pools island, northwestward nearly 1 mile from South Pound 

 islet, is 114 feet high, with a round summit, and rather higher than 

 the adjacent land. There are two flagstaff s on the island. 



Main Pools island lies about 200 yards northwestward of Big 

 Pools island: its church, which has a spire and is painted white, is 

 visible from a distance except when hidden behind Big Pools Island 

 hill. 



