MIND UNDER WATER. 179 



hearing he is still circumscribed and limited to the 

 groove of the brook. The birds fly from field to 

 field, from valley to mountain, and across the sea. 

 Their experience extends to whole countries, and their 

 opportunities are constant. How much more fortunate 

 in this respect than the jack ! A small display of in- 

 telligence by the fish is equivalent to a large display 

 by the bird. 



When the jack has been much disturbed no one can 

 do more than obtain a view of him, however skilfully 

 he may conceal himself. The least sign of further 

 proceedings will send the jack away ; sometimes the 

 .mere appearance of the human form is sufficient. If 

 less suspicious, the rod with the wire attached or if 

 you wish to make experiments, the rod without the 

 wire can be placed in the water, and moved how 

 you choose. 



