Arkos did not choose to belabor the cautious amendment, but merely frowned. The abbot’s frown, Brother Francis had come to observe, was the causative source of radiant energy which traveled through space with finite velocity and which was as yet not very well understood except in terms of its withering effect upon whatever thing absorbed it, that thing usually being a postulant or novice. Francis had absorbed a five-second burst of the stuff by the time the next question was put to him.