Yes, it was a shadow; but no new one; it only fell heavier and stretched further than before. And gradually Carlton became obsessed with the idea that he must do something, take some step, give some earnest of voluntary responsibility, no matter what new humiliation awaited him. But what to do, what step to take, for the best! As life grew a very little easier in other ways that have been shown, this problem came upon Carlton as a fresh complication, and as a poignant reminder of his original wickedness. It was not, however, a problem to be solved out of hand. It required infinite thought, and ceaseless prayer for that right judgment for which Robert Carlton now again looked upward as well as within. But while he thought, and even while he prayed, the walls were still growing under his hands. And in his work he was strangely and serenely happy; there were no more spasmodic joys and qualms. Enormous difficulties lay between him and the impossible roof. He was at once artist and man enough to be stimulated by these. He drew in chalk, upon the bare floors of his disused rooms, full-size diagrams of all his arches, divided into as many parts as there were to be stones, according to the easy rule set forth in his precious book. Then he collected all the boxes, tin, wood, and cardboard, that he could find upon the premises, and cut these up into numbered patterns coinciding exactly with the diagrams on the floor, thus providing himself with evening occupation for a whole winter, and having all in readiness by the spring. Summer, however, found him still in travail with the mullioned window in the north transept; and the mullion and the tracery he was omitting altogether; the bare arch beat him long enough.