83 



common to all rivers which produce the lat- 

 ter, and it is rather remarkable that it is not 



* 

 to be met with either in Scotland or Ireland. 



The rivers in Derbyshire, Yorkshire, Shrop- 

 shire, and Staffordshire, and the Dee which 

 runs through a considerable portion of North 

 Wales, will however furnish them in suffici- 

 ent numbers for the Angler's amusement. 

 In France and Switzerland they are found 

 in moderate quantities, and are greatly 

 esteemed. 



The title of Grayling appears to have 

 been given to this fish from the gray silver 

 colour of its sides ; that of Umber to be de- 

 rived from the Latin Umbra, a shadow, 

 which the rapidity of its motions authorizes, 

 inasmuch as when swimming, it darts with 

 such velocity as to give the semblance to 

 the eye of the flitting of a shadow, rather 

 than the actual movement of an animated 

 substance. 



