stop-hole

There, in yon stop-hole underneath that tree, not ten feet broad or twenty long, where just enough water trickles through the hatches to make a ripple, are a brace of noble fish, no doubt; and one of them you may be sure of, if you will go the proper way to work, and fish scientifically with the brace of flies I have put on for you -- a governor and a black alder.

Prose Idylls, New and Old Charles Kingsley 1847

Now we will go and recover the flies off the hatches; and you will agree that there is more cunning, more science, and therefore more pleasant excitement, in 'foxing' a great fish out of a stop-hole, than in whipping far and wide over an open stream, where a half-pounder is a wonder and a triumph.

Prose Idylls, New and Old Charles Kingsley 1847