this; yet notwithstanding this difficulty, I think it is possible
to protect the fish without interfering with the interest of the
mill-owners, and to make such laws on the subject as will be
effectual, without calling forth a single objection from any
unprejudiced person. I shall be glad if what I have said on this
subject should induce any gentleman to turn his attention to it.
There must be many whose opportunities of observation will enable
them to determine whatever is doubtful in the natural history of
the Salmon tribe; whose experience will teach them the defects and
absurdities of the present laws on the fisheries; and whose
influence will, if they can be induced to exert it, materially
contribute to their amendment.

CLITHEROE, _January_, 1834.

* * * * *

THE SALMON ENTERS AND ASCENDS RIVERS FOR OTHER PURPOSES BESIDES
PROPAGATION. [5]

In addition to the objections which I have offered to the seeming
doubt of Dr. Fleming, whether Salmon enter rivers for any other
purpose besides propagation, the following have come to mind; and
though they do not apply to the Salmon, they confirm me in the
opinion that there are reasons, of which we know nothing, for fish
ascending rivers, which are not at all connected with propagation.
One is the habit of what is here called streaming. In the winter
the fish not engaged in spawning (I speak of Trout, Grayling,
Chub, Dace, &c.) leave the streams and go into deep water; either
because the water is warmer there, or because they there find more