Morse nodded. 'All right. We'll start in the middle, I think. We'll start at the point where you walked into the Syndicate building at about 4.25 p.m. a week last Friday. The first person you saw was the caretaker, Noakes, mending a broken light-tube in the corridor. But it was soon clear to you that there was no one else in the downstairs offices at all. No one! You concocted some appropriate tale about having to leave some papers with Dr. Bartlett, and since he was out you had the best reason in the world for trying to find one of the others and for looking into their offices. You looked into Quinn's, of course, and everything was just as you'd known it would be — as you'd planned it would be. Everything was cleverly arranged to give the clear impression to anyone going into his room that Quinn was there—in the office; or, at least, would be there again very soon. It was raining heavily all day Friday — a piece of good luck! — and there, on the back of Quinn's chair, was his green anorak. Who would leave the office on a day like that without taking his coat? And the cabinets were left open. Now cabinets contain question papers, and the Secretary would have been down like a hawk on any of his colleagues who showed the slightest carelessness over security. But what are we asked to believe in Quinn's case? Quinn? Recently appointed; briefed, doubtless ad nauseam, about the need for the strictest security at every second of every day. And what does he do, Roope? He goes out and leaves his cabinets open! Yet, at the very same time, we find evidence of Quinn's punctilious adherence to the Secretary's instructions. Since he took up his job a few months previously, he has been told, very pointedly told, that it doesn't matter in the slightest if he takes time off during the day. But—if he does go out, he's to leave a note informing anyone who might want him exactly where he is or what he's doing. In other words, what Bartlett says is all the law and the commandments. Now, I find the combination of these two sets of circumstances extremely suggestive, Roope. Some of us are idle and careless, and some of us are fussy and conscientious. But very few of us manage to be both at the same time. Wouldn't you agree?'
Roope was staring through the window on to the concrete yard. He was watchful and tensed, but he said nothing.
The caretaker told you that he was going off for tea, and before long you were alone—or so you thought—on the ground floor of the Syndicate building. It was still only about half past four, and although I suspect you'd originally planned to wait until the whole office was empty, this was too good a chance to miss. Noakes, quite unwittingly, had given you some very interesting information, though you could very easily have found it out for yourself. The only car left in the rear car park was Quinn's. Well, what happened then was this, or something very like it. You went into Quinn's room once more. You took his anorak, and you put it on. You kept your gloves on, of course, and you folded up the plastic mac you'd been wearing. Then you saw that note once more, and you decided that you might as well pocket it. Certainly Quinn wouldn't have left it on the desk if he'd returned, and from this point on you had to think and act exactly as Quinn would have done. You walked out of the back door and found — as you knew you would — that Quinn's car keys were in his anorak pocket. No one was around, of course: the weather was still foul — though ideal for you. You got into the car and you drove away from the building. Noakes in fact saw you leave as he sat upstairs having a cup of tea. But he thought — why shouldn't he? — that it was Quinn. After all, he could only see the top of the car. So? That was that. The luck was on your side at this stage, and you made the most of it. The first part of the great deception was over, and you'd come through it with flying colours!'
Roope shuffled uneasily on his hard wooden chair, and his eyes looked dangerous; but again he said nothing.