GRAYLING. 167 



nor, like char or chub, in deep pools or 

 lakes. They require a combination of stream 

 and pool; they like a deep still pool for 

 rest, and a rapid stream above, and a gra- 

 dually declining shallow below, and a bottom 

 where marl or loam is mixed with gravel; 

 and they are not found abundant except in 

 rivers that have these characters. It is 

 impossible to see a more perfect specimen 

 of a grayling river than that now running 

 before us, in this part of its course. You 

 see a succession of deep still pools under 

 shady banks of marl, with gentle rapids 

 above, and a long shelving tail, where the 

 fish sport and feed. If there are no such 

 pools in a river, grayling will remain, pro- 

 vided the water be clear, and will breed; 

 but they cannot stem rapid streams, and 

 they are gradually carried down lower and 

 lower, and at last disappear. You know 

 the Test, one of the finest trout streams in 

 Hampshire, and of course in England ; 

 when I first knew this stream, twenty years 

 ago, there were no grayling in it. A gen- 

 tleman brought some from the Avon, and 



