'Now, that there were in existence keys which fitted this particular lock cannot, I think, be seriously doubted by anyone who has listened carefully to the evidence which has been put forward both by the prosecution and by the defence in this case.' (Gratification of jury. How simple it all seems when a master-mind is at work upon the apparent mystery!) 'The only question left for you to decide, so far as I can discover, and if I am wrong it is not for want of careful consideration, is this: whether on that night into which we are inquiring the prisoner had or had not a latchkey, and, if so, whether she used it, and in either case, whether any other person had a similar key, which he also employed in opening the door of this house.' (Jury getting slightly fogged again. But they no longer sorrow as one who hath no hope. They rely on his lordship to pull them through.) 'It is perhaps a circumstance worth noting, though the explanation may be very simple, that neither side has produced a latchkey purporting to be one of those belonging to the latch in question.' (The explanation _was_ simple. Neither side had thought of it.) 'But in the absence of any ocular demonstration one way or the other, we are, I think, justified in assuming that the keys in question were small, portable articles, such as could conveniently be carried in the pocket. In saying this I merely appeal to your own experience as men of business and householders, who are most of you probably in the constant habit of carrying articles of this kind yourselves.' (Jury in smooth water again. How could they ever have thought this matter presented difficulties?) 'There, gentlemen, I must leave you. I can throw no farther light upon the hidden circumstances of that night, and must leave you to decide for yourselves on a calm and deliberate review of the evidence whether, in your opinion, such a key as I have indicated was, or was not, in the possession of the prisoner at the bar, or of any other individual whose name has or has not transpired in the course of this trial, and if so, whether the prisoner, or that other person, or both of them, did or did not obtain access to the house by means of that nature.' Collapse of jury. Dashed in a moment from their height of fancied security, they lie helpless at the bottom of the abyss. The summing-up was nearly over. Tressamer had begun to hope the judge had forgotten him. But Sir Daniel had reserved his melodramatic effects to the last, as all orators know they ought to do.