"So then," Colle persists, "why all the languages?" "The prevailing theory is that language is one of the constraints." "But you think otherwise?" "I was investigating the mutual influence of language and magic use upon each other." "And now?" She hasn't missed his use of the past tense. "Now I am doing damage limitation." He stands up. "Which reminds me, I will not be here for the next few days." "Ah, another book?" "Yes." "Good luck." "Thank you."