‘The latchkey incident is dead in her favour.’
Here the jury, who had shown signs of weariness after their long sitting, brightened up again. They had made up their minds that this was the real point in the case, and were honestly anxious for light upon it.
‘Two things are clear—first, that the person who last came into the house, and did up the fastenings, was the prisoner; second, that the prisoner had a latchkey, whether her own one found again or one which she borrowed from Miss Lewis. Now, if the prisoner had committed this murder, let us see what she would naturally have done in trying to throw suspicion off herself.
‘In the first place, I say she would not have fastened up the front-door. To do so was practically saying that the crime was not the work of an outsider. No, she would have left the door wide open, as if the criminal were some common robber who had carried off his booty and run away. In the second place, she would have thrown away her latchkey, so as to make it appear that she had not been outside. These points are so important that, with your permission, I will repeat them again.’
Anyone who has had experience of juries knows how difficult it is to get into their minds a process of logical reasoning. To the trained lawyer such a thing is not so hard, but even to him it is far easier to master reasoning from a book than by word of mouth. Oral teaching has its advantages, doubtless, but few things are harder than to convey ideas of any subtlety by means of speech to an audience.
Tressamer patiently set to work, and for twenty minutes he repeated and explained all that he had been saying. When he thought that the jury really understood him he returned to where he had started from, and re-directed their suspicions on Lewis.
‘Before I sit down I think I ought to suggest to you how this crime really was done. You have heard the story of the prosecution. Now let me put to you my story on behalf of the prisoner.
‘The deceased woman was wealthy. About her jewels we know nothing, and I do not refer to them, but she had other property to a large extent. The whole of this was to go at her death to a nephew. For two years she lived in this house alone night after night with the prisoner, and nothing happened. At last the nephew who was to inherit her wealth suddenly returned from the other end of the world. That night she met her death.
‘At twelve o’clock her companion, who suffered from sleeplessness, went out for a long walk. Hardly had she closed the door behind her than the murderer stole up to it and made his way in. Probably he had a latchkey. We know that Miss Owen had mislaid hers. It may have been that. We also know that Miss Lewis had a spare one, and that her nephew was to take up his residence in the house on the very next morning. So that, mark this, if the murder had been deferred for one more day he would have fallen under the same suspicion as Miss Owen, and probably a good deal more.