Then Hilary, too, set forth.
There is left in every man something of the primeval love of stalking.
The delicate Hilary, in cooler blood, would have revolted at the notion of dogging people's footsteps.

He now experienced the holy pleasures of the chase.

Certain that Hughs was really following the girl, he had but to keep him in sight and remain unseen.

This was not hard for a man given to mountain-climbing, almost the only sport left to one who thought it immoral to hurt anybody but himself.
Taking advantage of shop-windows, omnibuses, passers-by, and other bits of cover, he prosecuted the chase up the steepy heights of Campden Hill.
But soon a nearly fatal check occurred; for, chancing to take his eyes off Hughs, he saw the little model returning on her tracks.

Ready enough in physical emergencies, Hilary sprang into a passing omnibus.