For seven long miles in one direction there is not so much as a wayside tavern; then the traveller finds a little cottage, with a bench under a shady sycamore and a trough for a thirsty horse, situate where three such modern roads (also lonely enough) cross the old green track. Far apart, and far away from its course hidden among their ricks and trees a few farmsteads stand, and near them perhaps a shepherd's cottage: otherwise it is an utter solitude, a vast desert of hill and plain; silent too, save for the tinkle of a sheep bell, or, in the autumn, the moaning hum of a distant threshing machine rising and falling on the wind. The origin of the track goes back into the dimmest antiquity; there is evidence that it was a military road when the fierce Dane carried fire and slaughter inland, leaving his `nailed bark' in the creeks of the rivers, and before that when the Saxons pushed up from the sea. The eagles of old Rome, perhaps, were borne along it, and yet earlier the chariots of the Britons may have used it--traces of all have been found; so that for fifteen centuries this track of the primitive peoples has maintained its existence through the strange changes of the times, till now in the season the cumbrous steam-ploughing engines jolt and strain and pant over the uneven turf. To-day, entering the ancient way, eight miles or so from the great earthwork, hitherto the central post of observation, I turn my face once more towards its distant rampart, just visible, showing over the hills a line drawn against the sky. Here, whence I start, is another such a camp, with mound and fosse; beyond the one I have more closely described some four miles is still a third, all connected by the same green track running along the ridges of the downs and entirely independent of the roads of modern days. They form a chain of forts on the edge of the down-land overlooking the vale. At starting the track is but just distinguishable from the general sward of the hill: the ruts are overgrown with grass--but the tough `tussocky' kind, in which the hares hide, avoids the path, and by its edge marks the way. Soon the ground sinks, and then the cornfields approach, extending on either hand-- barley, already bending under the weight of the awn, swaying with every gentle breath of air, stronger oats and wheat, broad squares of swede and turnip and dark-green mangold.