Read it through once

From the western gate aforesaid the highway, as every Wintoncestrian knows, ascends a long and regular incline of the exact length of a measured mile, leaving the houses gradually behind. Up this road from the precincts of the city two persons were walking rapidly, as if unconscious of the trying ascent—unconscious through preoccupation and not through buoyancy. They had emerged upon this road through a narrow, barred wicket in a high wall a little lower down. They seemed anxious to get out of the sight of the houses and of their kind, and this road appeared to offer the quickest means of doing so. Though they were young, they walked with bowed heads, which gait of grief the sun’s rays smiled on pitilessly.