"It was over some rhymes," he explained. "I was giving my usual course of Advanced Emotional Engineering for Third Year Students. Twelve lectures, of which the seventh is about rhymes. 'On the Use of Rhymes in Moral Propaganda and Advertisement,' to be precise. I always illustrate my lecture with a lot of technical examples. This time I thought I'd give them one I'd just written myself. Pure madness, of course; but I couldn't resist it." He laughed. "I was curious to see what their reactions would be. Besides," he added more gravely, "I wanted to do a bit of propaganda; I was trying to engineer them into feeling as I'd felt when I wrote the rhymes. Ford!" He laughed again. "What an outcry there was! The Principal had me up and threatened to hand me the immediate sack. l'm a marked man."