All it says is the place is "a good station for fishing;" and, from what I have seen of the district, I am quite prepared to bear out this statement.
There is no spot in the world where you can get more fishing, or where you can fish for a longer period.

Some fishermen come here and fish for a day, and others stop and fish for a month.

You can hang on and fish for a year, if you want to: it will be all the same.
The _Angler's Guide to the Thames_ says that "jack and perch are also to be had about here," but there the _Angler's Guide_ is wrong.

Jack and perch may _be_ about there.

Indeed, I know for a fact that they are.
You can _see_ them there in shoals, when you are out for a walk along the banks: they come and stand half out of the water with their mouths open for biscuits.