After his gallop Athlyne went quietly along the road past Grant’s Tomb and followed the course of the Drive. Here the road descended, circling round the elevation on which the Tomb is erected. Below it is the valley of some old watercourse into the Hudson. This valley has been bridged by a viaduct over which the Drive continues its course up the side of the river for many miles. To-day however, it was necessary to make a detour, descend the steep on the hither side of the valley and rise up the other side. Some settlement had affected the base of the up-river end of the bridge and it had given way. The rock on which New York is based is of a very soft nature, and rots slowly away, so that now and again a whole front of a house will slide down a slope, the underlying rock having perished. Not long before, this had actually happened to a group of houses in Park Row. Now the bridge had fallen away; the road ended abruptly, and below lay a great shapeless mass of twisted metal and stone. The near end of the viaduct was barred off with wooden rails, and in the centre was a great board with a warning that the thoroughfare was closed. Athlyne rode up as far as the Up-Town Club, sat for awhile amongst the trees on the river bank and thought of many things. Amongst these of the girl with the gray eyes who looked so admiringly at his horse--or himself. Perhaps he accepted the latter alternative, for as his thoughts ran he smiled and stroked his big moustache. When he rode towards town again he kept a sharp look out, unconsciously slackening speed when any old man and young woman riding together came in sight. He had ascended the eastern side of the valley, over which lay the broken viaduct, and commenced to traverse the curved slope leading up to Grant’s Tomb when he heard a sudden shouting on the road in front and saw a rush of people to both sides and up the steps to the Tomb. An instant after a mounted constable appeared urging his horse to a gallop as he cried out: “Clear the road! Clear the road! It’s a run-a-way!” Instinctively Athlyne drew to the roadside, a double purpose in his mind; to keep the way clear as directed, and to be able to render assistance if possible. The noise and cries drew closer and there was on the hard road a thunder of many hoof strokes. Then round the curve swept a brown mare dashing madly in a frenzied gallop--the neck stretched out and the eyes flaming. The woman who rode her, a tall girl with black hair and great gray eyes, sat easily, holding her reins so as to be able to use them when the time should come. She was in full possession of herself. She did not look frightened, though her face was very pale. Behind her but a little way off came two mounted policemen and the old man with the big white moustache. Other men variously mounted came hurrying in the background; beyond them a whole long series of horse vehicles and motor cars.