"No fields, indeed, remained, for where the ground was dry, the
thorns, briars, brambles, and saplings already mentioned filled the
space, and these thickets and the young trees had converted most
part of the country into an immense forest. Where the ground was
naturally moist, and the drains had become choked with willow
roots, which, when confined in tubes, grow into a mass like the
brush of a fox, sedges and flags and rushes covered it. Thorn
bushes were there, too, but not so tall; they were hung with
lichen. Besides the flags and reeds, vast quantities of the tallest
cow-parsnips or "gicks" rose five or six feet high, and the willow
herb with its stout stem, almost as woody as a shrub, filled every
approach."
"By the thirtieth year there was not one single open place, the
hills only excepted, where a man could walk, unless he followed the
tracks of wild creatures or cut himself a path. The ditches, of
course, had long since become full of leaves and dead branches, so
that the water which should have run off down them stagnated, and
presently spread out into the hollow places and by the corner of
what had once been fields, forming marshes where the horsetails,
flags, and sedges hid the water."
Richard Jeffries, After London