The pilgrims of the Middle Ages probably went straight up the hill from Merstham by an existing track, got on to this clay, and followed Pilgrim's Lane along the crest--some shrine or house of call attracted them. The prehistoric road would certainly not have taken the clay in this fashion. On every analogy to be drawn from the rest of its course it would climb the hill at a slow slant, keeping to the chalk till it should reach the summit at some point where the clay had stopped and the slope below had begun to be steep. The problem before us was to discover by what line it climbed. And the beginning of the climb that would have given us the whole alignment was utterly lost, as I have said, in this mass of modern things, roads, railways, and cuttings, which we found just after Merstham church. We walked along the road which leads to Rockshaw, and along which certain new villas have been built. We walked slowly, gazing all the time at the fields above us, to the north and the hillside, and searching for an indication of our path. The first evidence afforded us was weak enough. We saw a line of hedge running up the hill diagonally near the 400-feet contour-line, and climbing slowly in such a direction as would ultimately point to the crest of the Quarry Hangers. Then we noticed the lime works, called on the map 'Greystone Lime Works,' which afforded us a further clue. We determined to make by the first path northward on to the hillside, and see if we could find anything to follow. Such a path, leading near a cottage down a slight slope and the hill beyond, appeared upon our left when we had covered about three quarters of a mile of road from Merstham. We took it and reached the hedge of which I have spoken. Once there, although no very striking evidence was presented to us, there was enough to make us fairly certain of the way. A continuous alignment of yew, hedge, and track, appeared behind us, coming straight, as it should do, from Merstham church and right _across_ the old lime pit; before us it continued to climb diagonally the face of the hill. Lost under the plough in more than one large field, it always reappeared in sufficient lengths to be recognised, and gained the crest at last at a point which just missed the end of the clay, and was also just over the beginning of the Quarry Hangers steep.[30]