There is an old park wall which follows the highway in all its turns with such fidelity of curve that for some two miles it seems as if the road had been fitted to the wall. Against it hawthorn bushes have grown up at intervals, and in the course of years their trunks have become almost timber. Ivy has risen round some of these, and, connecting them with the wall, gives them at a distance the appearance of green bastions. Large stems of ivy, too, have flattened themselves upon the wall, as if with arched back they were striving like athletes to overthrow it. Mosses, brown in summer, soft green in winter, cover it where there is shadow, and if pulled up take with them some of the substance of the stone or mortar like a crust, A dry, dusty fern may perhaps be found now and then on the low bank at the foot--a fern that would rather be within the park than thus open to the heated south with the wall reflecting the sunshine behind. On the other side of the road, over the thin hedge, there is a broad plain of corn-fields. Coming from these the labourers have found out, or made, notches in the wall; so that, by putting the iron-plated toes of their boots in, and holding to the ivy, they can scale it and shorten their long trudge home to the village. In the spring the larks, passing from the green corn to the pasture within, fluttering over with gently vibrating wings and singing as they daintily go, sometimes settle on the top. There too the yellow-hammers stay. In the crevices blue tits build deep inside passages that abruptly turn, and baffle egg-stealers. Partridges come over with a whir, but just clearing the top, gliding on extended wings, which to the eye look like a slight brown crescent. The waggoners who go by know that the great hawthorn bastions are favourite resorts of wood-pigeons and missel-thrushes. The haws are ripe in autumn and the ivy berries in spring, so that the bastions yield a double crop. A mallow, the mauve petals of which even the dust of the road cannot impair, flowers here and there on the dry bank below, and broad moon-daisies among the ripe and almost sapless grass of midsummer.