But Edwin, suddenly stopped by what he saw, was drawing the bowstring on a fitted arrow. He had paused on the brink of a crevasse in the embankment. An ancient culvert had here washed out, and the stream, no longer confined, had cut a passage through the fill. On the opposite side, the end of a rail projected and overhung. It showed rustily through the creeping vines which overran it. Beyond, crouching by a bush, a rabbit looked across at him in trembling hesitancy.