’Quite so.  As a matter of fact, that screw was not used.  This bottle was opened by a pocket screw, probably contained in a knife, and not more than an inch and a half long.  If you will examine the top of the cork, you will observe that the screw was driven in three times before the cork was extracted.  It has never been transfixed.  This long screw would have transfixed it and drawn it up with a single pull.  When you catch this fellow, you will find that he has one of these multiplex knives in his possession.’

‘Excellent!’ said Hopkins.

’But these glasses do puzzle me, I confess.  Lady Brackenstall actually saw the three men drinking, did she not?’

‘Yes; she was clear about that.’

’Then there is an end of it.  What more is to be said?  And yet, you must admit, that the three glasses are very remarkable, Hopkins.  What?  You see nothing remarkable?  Well, well, let it pass.  Perhaps, when a man has special knowledge and special powers like my own, it rather encourages him to seek a complex explanation when a simpler one is at hand.  Of course, it must be a mere chance about the glasses.  Well, good-morning, Hopkins.  I don’t see that I can be of any use to you, and you appear to have your case very clear.  You will let me know when Randall is arrested, and any further developments which may occur.  I trust that I shall soon have to congratulate you upon a successful conclusion.  Come, Watson, I fancy that we may employ ourselves more profitably at home.’

During our return journey, I could see by Holmes’s face that he was much puzzled by something which he had observed.  Every now and then, by an effort, he would throw off the impression, and talk as if the matter were clear, but then his doubts would settle down upon him again, and his knitted brows and abstracted eyes would show that his thoughts had gone back once more to the great dining-room of the Abbey Grange, in which this midnight tragedy had been enacted.  At last, by a sudden impulse, just as our train was crawling out of a suburban station, he sprang on to the platform and pulled me out after him.

‘Excuse me, my dear fellow,’ said he, as we watched the rear carriages of our train disappearing round a curve, ’I am sorry to make you the victim of what may seem a mere whim, but on my life, Watson, I simply can’t leave that case in this condition.  Every instinct that I possess cries out against it.  It’s wrong—­it’s all wrong—­I’ll swear that it’s wrong.  And yet the lady’s story was complete, the maid’s corroboration was sufficient, the detail was fairly exact.  What have I to put up against that?  Three wineglasses, that is all.  But if I had not taken things for granted, if I had examined everything with care which I should have shown had we approached the case de novo and had no cut-and-dried story to warp my mind, should I not then have found something more definite to go upon?  Of course I should.  Sit down on this bench, Watson, until a train for Chislehurst arrives, and allow me to lay the evidence before you, imploring you in the first instance to dismiss from your mind the idea that anything which the maid or her mistress may have said must necessarily be true.  The lady’s charming personality must not be permitted to warp our judgment.