“ ‘I can’t imagine anywhere I’d rather be,’ I said, slowly and deliberately. ‘I’ll go. Thank you very much for suggesting it. Now you run along, or you’ll miss your appointment.’

“Off he went, grateful to have done something for me and to have escaped without trouble. He wasn’t telling me anything I didn’t already know. I had been to Eisengrim’s Soirée of Illusions the week before, with my father and Denyse and Lorene, whose birthday it was. I was sucked into it at the last minute, and had not liked the show at all, though I could see that it was skilful. But I detested Magnus Eisengrim.

“Shall I tell you why? Because he was making fools of us all, and so cleverly that most of us liked it; he was a con man of a special kind, exploiting just that element in human credulity that most arouses me—I mean the desire to be deceived. You know that maddening situation that lies behind so many criminal cases, where somebody is so besotted by somebody else that he lays himself open to all kinds of cheating and ill-usage, and sometimes to murder? It isn’t love, usually; it’s a kind of abject surrender, an abdication of common sense. I am a victim of it, now and then, when feeble clients decide that I am a wonder-worker and can do miracles in court. I imagine you get it, as an analyst, when people think you can unweave the folly of a lifetime. It’s a powerful force in life, yet so far as I know it hasn’t even a name—”

“Excuse me—yes, it has a name. We call it projection.”

“Oh. I’ve never heard that. Well, whatever it is, it was going full steam ahead in that theatre, where Eisengrim was fooling about twelve hundred people, and they were delighted to be fooled and begging for more. I was disgusted, and most of all with the nonsense of the Brazen Head.

“It was second to the last illusion on his program. I never saw the show to the end. I believe it was some sexy piece of nonsense vaguely involving Dr Faustus. But The Brazen Head of Friar Bacon was what had caused the most talk. It began in darkness, and slowly the light came up inside a big human head that floated in the middle of the stage, so that it glowed. It spoke, in a rather foreign voice. ‘Time is,’ it said, and there was a tremble of violins; ‘Time was,’ it said, and there was a chord of horns; ‘Time’s past,’ it said, and there was a very quiet ruffle of drums, and the lights came up just enough for us to see Eisengrim—he wore evening clothes, but with knee-breeches, as if he were at Court—who told us the legend of the Head that could tell all things.

“He invited the audience to lend him objects, which his assistants sealed in envelopes and carried to the stage, where he mixed them up in a big glass bowl. He held up each envelope as he chose it by chance, and the Head identified the owner of the hidden object by the number of the seat in which he was sitting. Very clever, but it made me sick, because people were so delighted with what was, after all, just a very clever piece of co-operation by the magician’s troupe.