Mr Thompson took a keen pride in his powers of observation. He would frequently observe, like the lamented Sherlock Holmes, the vital necessity of taking notice of trifles. The daily life of a Sixth Form master at a big public school does not afford much scope for the practice of the detective art, but Mr Thompson had once detected a piece of cribbing, when correcting some Latin proses for the master of the Lower Third, solely by the exercise of his powers of observation, and he had never forgotten it. He burned to add another scalp to his collection, and this Pavilion burglary seemed peculiarly suited to his talents. He had given the matter his attention, and, as far as he could see, everything pointed to the fact that skilled hands had been at work.
From eleven until half-past twelve that day, the Sixth were doing an unseen examination under the eye of the Headmaster, and Mr Thompson was consequently off duty. He took advantage of this to stroll down to the Pavilion and make a personal inspection of the first room, from which what were left of the prizes had long been removed to a place of safety.
He was making his way to the place where the ground-man was usually to be found, with a view to obtaining the keys, when he noticed that the door was already open, and on going thither he came upon Biffen, the ground-man, in earnest conversation with a stranger.
'Morning, sir,' said the ground-man. He was on speaking terms with most of the masters and all the boys. Then, to his companion, 'This is Mr Thompson, one of our masters.'
'Morning, sir,' said the latter. 'Weather keeps up. I am Inspector Roberts, Scotland Yard. But I think we're in for rain soon. Yes. 'Fraid so. Been asked to look into this business, Mr Thompson. Queer business.'
'Very. Might I ask—I am very interested in this kind of thing—whether you have arrived at any conclusions yet?'
The detective eyed him thoughtfully, as if he were hunting for the answer to a riddle.
'No. Not yet. Nothing definite.'
'I presume you take it for granted it was the work of a professional burglar.'
'No. No. Take nothing for granted. Great mistake. Prejudices one way or other great mistake. But, I think, yes, I think it was probably—almost certainly—
Mr Thompson looked rather blank at this. It shook his confidence in his powers of deduction.
'But,' he expostulated. 'Surely no one but a practised burglar would have taken a pane of glass out so—ah—neatly?'
Inspector Roberts rubbed a finger thoughtfully round the place where the glass had been. Then he withdrew it, and showed a small cut from which the blood was beginning to drip.
'Do you notice anything peculiar about that cut?' he enquired.
Mr Thompson did not. Nor did the ground-man.
'Look carefully. Now do you see? No? Well, it's not a clean cut. Ragged. Very ragged. Now if a professional had cut that pane out he wouldn't have left it jagged like that. No. He would have used a diamond. Done the job neatly.'
This destroyed another of Mr Thompson's premises. He had taken it for granted that a diamond had been used.
'Oh!' he said, 'was that pane not cut by a diamond; what did the burglar use, then?'
'No. No diamond. Diamond would have left smooth surface. Smooth as a razor edge. This is like a saw. Amateurish work. Can't say for certain, but probably done with a chisel.'
'With a chisel? Surely not.'
'Yes. Probably with a chisel. Probably the man knocked the pane out with one blow, then removed all the glass so as to make it look like the work of an old hand. Very good idea, but amateurish. I am told that three cups have been taken. Could you tell me how long they had been in the Pavilion?'
Mr Thompson considered.
'Well,' he said. 'Of course it's difficult to remember exactly, but I think they were placed there soon after one o'clock the day before yesterday.'
'Ah! And the robbery took place yesterday in the early morning, or the night before?'
'Yes.'
'Is the Pavilion the usual place to keep the prizes for the Sports?'
'No, it is not. They were only put there temporarily. The Board Room, where they are usually kept, and which is in the main buildings of the School, happened to be needed until the next day. Most of us were very much against leaving them in the Pavilion, but it was thought that no harm could come to them if they were removed next day.'
'But they were removed that night, which made a great difference,' said Mr Roberts, chuckling at his mild joke. 'I see. Then I suppose none outside the School knew that they were not in their proper place?'
'I imagine not.'
'Just so. Knocks the idea of professional work on the head. None of the regular trade can have known this room held so much silver for one night. No regular would look twice at a cricket pavilion under ordinary circumstances. Therefore, it must have been somebody who had something to do with the School. One of the boys, perhaps.'
'Really, I do not think that probable.'