Two rooks flew over the Cathedral Close, and as they neared the old square Norman tower they cawed in a sneering way. That was enough. Out like magic came the jackdaws from hole and corner-snapping, snarling, and barking birdily-to join in a hue and cry as they formed a pack to drive away the bucolic intruders who dared to invade the precincts sacred to daws from the beginning of architectural time; and this task over, they returned to sit on corbel, leaden spout, crevice, and ledge, to erect the feathers of their powdered heads and make remarks to one another, till the chimes rang out and the big bell boomed the hour.