Here is an extract from ‘Angling’ or ‘How to angle and where to go’ by Robert Blakey from 1877.
‘The White Horse, Hackney Marsh, is a locality much frequented. The liberty of fishing here is let out either by the year, or by the day. The subscription for the season is ten shillings and sixpence; this includes the right of trolling for trout or jack. One shilling is the charge for a day’s sport, including fly fishing and bottom fishing, but not trolling. There are great numbers of fish here; and some capital sport is occasionally obtained.’
‘The Horse & Groom, at Lea Bridge, is a very old angling station, having been used as such for upwards of a century. The angler has here the liberty of two miles of water on each side of the house; and the terms are precisely the same as at the White Horse. The fish are commonly more numerous here than on any other portion of the river, chiefly on account of the locks being here, and the fish can ascend no further unless a passage be opened out for them. Sometimes the fish may be seen in immense shoals about the vicinity of the locks, and may readily be taken by even lowering naked hooks amongst them. Trout of twelve, pike of twenty-five ,barbel of nine, and chub of four pounds, have been taken out of the Lea in this locality.’