478 
CORRESPONDENCE. 
Occurrence of the Black Scoter and Crested Grebe near Nottingham, 
To the Editor of the Naturalist. 
Sir, —The Black Scoter ( Oidemia nigra , Fleming) has been seen in consider¬ 
able numbers on the river Trent, near this town, during the last week. I have 
examined three specimens which were shot at the beginning of the week, from 
a flock near the Trent Bridge; and I am told that many more were seen a few 
miles lower down the river. I have never before heard of an instance of this 
bird being shot in this neighbourhood; and on referring to Colonel Montagu’s 
Ornithological Dictionary , I find it stated that “ it is never observed to visit our 
rivers or fresh-water lakes.’* The Crested Grebe (Podiceps cristatus , Lath.) has 
also been killed this week on the Trent, within two miles of Nottingham, and it 
seems probable that the long-continued cold East winds of the last fortnight may 
have caused these strangers to visit us. Even in the Winter of 1837-3? when 
the Smew, Sclavonian and Red-necked Grebes, Goosander, Golden-eye, Black- 
throated Diver, and other rare water birds, as well as the Peregrine Falcon, were 
driven here by the weather, not a single specimen of the Black Scoter was seen; 
so that it is difficult to account for their being found in such large numbers away 
from their usual haunts at this season. 
I am, Sir, 
Your obedient servant, 
Richard Enfield, 
Hon. Sec. of the Nottingham Nat.-Hist. Society . 
Nottingham , April 18, 1839. 
Geological Map of England. 
[We have received the following additional particulars respecting the map recom¬ 
mended in our last No. (p. 449), and need make no apology for inserting the 
letter of Mr. Nichols, the publisher of the map.— Ed.] 
To the Editor of the Naturalist . 
Wakefield ,, April 24, 1839. 
Sir,— In reply to your favour of the 19th instant, received yesterday, I beg to 
state that the price of our Map of the Inland Navigation , Canals , and Rail-roads 
of England , Scotland , and Wales —which is also a geological map, and has 
received the entire approbation of Mr. Green^ough, one of the Presidents of the 
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