I dont know. I dont know
But you do know.
You know perfectly.
Perhaps I can help you with a guess.
Did you, Dr Leidner, suspect that these letters were all written by your wife herself?
There wasnt any need for him to answer.
The truth of Poirots guess was only too apparent.
The horrified hand he held up, as though begging for mercy, told its own tale.
I drew a deep breath.
So I had been right in my half-formed guess!
I recalled the curious tone in which Dr Leidner had asked me what I thought of it all.
I nodded my head slowly and thoughtfully, and suddenly awoke to the fact that M. Poirots eyes were on me.
Did you think the same, nurse?
The idea did cross my mind, I said truthfully.
For what reason?
I explained the similarity of the handwriting on the letter that Mr Coleman had shown me.
Poirot turned to Dr Leidner.
Had you, too, noticed that similarity?
Dr Leidner bowed his head.
Yes, I did.
The writing was small and cramped not big and generous like Louises, but several of the letters were formed the same way.
I will show you.
From an inner breast pocket he took out some letters and finally selected a sheet from one, which he handed to Poirot.
It was part of a letter written to him by his wife.
Poirot compared it carefully with the anonymous letters.
Yes, he murmured.
Yes.
There are several similarities a curious way of forming the letters, a distinctivee.
I am not a handwriting expert I cannot pronounce definitely (and for that matter, I have never found two handwriting experts who agree on any point whatsoever) but one can at least say this the similarity between the two handwritings is very marked.
It seems highly probable that they were all written by the same person. But it is not certain.
We must take all contingencies into mind.
He leaned back in his chair and said thoughtfully: There are three possibilities.
First, the similarity of the handwriting is pure coincidence.
Second, that these threatening letters were written by Mrs Leidner herself for some obscure reason.
Third, that they were written by someone who deliberately copied her handwriting.
Why?
There seems no sense in it.
One of these three possibilities must be the correct one.
He reflected for a minute or two and then, turning to Dr Leidner, he asked, with a resumal of his brisk manner: When the possibility that Mrs Leidner herself was the author of these letters first struck you, what theory did you form?
Dr Leidner shook his head.
I put the idea out of my head as quickly as possible.
I felt it was monstrous.
Did you search for no explanation?
Well, he hesitated. I wondered if worrying and brooding over the past had perhaps affected my wifes brain slightly.
I thought she might possibly have written those letters to herself without being conscious of having done so.
That is possible, isnt it? he added, turning to Dr Reilly.
Dr Reilly pursed up his lips. The human brain is capable of almost anything, he replied vaguely. But he shot a lightning glance at Poirot, and as if in obedience to it, the latter abandoned the subject.
The letters are an interesting point, he said. But we must concentrate on the case as a whole.
There are, as I see it, three possible solutions.
Three?