From the car park they cross a narrow brook and take the path up the valley in front of them. Robert has traced out a route along the dotted footpaths marked on the Ordnance Survey map. His square back and shoulders move ahead. Vanessa's boots squelch in the half-frozen mud. They climb in silence, following the trail along the side of the lower hillslope. There are footprints in the mud but once the car park has passed from view she cannot see any other forms of human life, only the white, drifted snow. Across the valley Vanessa occasionally mistakes a rock for a human figure. She thinks how difficult it would be to find someone if they were lost up here. She is glad she is wearing her bright yellow waterproof. Robert has on only an old, brown flying jacket. From the air he would be indistinguishable from the boulders littering the hillside, she thinks.