NATURALIZATION OF MIGRATORY FISHES. 109 



of Mr. Stoddart. But the most singular circum- 

 stance, remarks this acute writer, connected with 

 the Edinburgh Water Company Reservoir, is, that 

 along with the breed of common fresh water trout, 

 there remains another precisely uniform with the 

 Sea- trout, or "VVhitling, which were wont some years 

 ago to ascend Glencorse Burn, above where the 

 pond now stands, and there spawn. The Esk, which 

 receives this small stream, has since been so dammed 

 below as to hinder this fish from running up to any 

 distance from the Sea. (Art of Angling, 62). If 

 this very decided change in habit can be made, as 

 appears from the evidence, in the Salmon- trout, the 

 inference is almost direct that it can also be effected 

 in regard to the Salmon. But this is not left a 

 matter of conjecture, and satisfactory evidence upon 

 the point may be extracted from Mr. Yarrell's in- 

 teresting pages. In the autumn of 1835, Thomas 

 Upton, Esq. enlarged a lake which had no com- 

 munication with the sea, nor any outlet whatever ; 

 and in the spring 1836, some Pinks, or young Sal- 

 mon, were introduced into it. Sixteen months after- 

 wards, this lake was fished, and two young Salmon 

 (Salmon Peal) were caught in excellent condition, 

 silvery bright in colour, measuring fourteen inches 

 in length, and weighing fourteen ounces. In the 

 month of July, 1838, eleven months after, another 

 small salmon was caught, equal to the first in con- 

 dition and colour. No doubt was entertained that 

 these fish had been transferred to the lake in spring 

 1836, so that the first had been retained sixteen 



