Agatha Christie: The Mysterious Affair at Styles

CHAPTER 5. "IT ISN'T STRYCHNINE, IS IT?" (continued)

"I strolled to the window, and saw at once that the begonia beds had been newly planted. The mould in the beds was exactly similar to that on the floor of the boudoir, and also I learnt from you that they had been planted yesterday afternoon. I was now sure that one, or possibly both of the gardeners--for there were two sets of footprints in the bed--had entered the boudoir, for if Mrs. Inglethorp had merely wished to speak to them she would in all probability have stood at the window, and they would not have come into the room at all. I was now quite convinced that she had made a fresh will, and had called the two gardeners in to witness her signature. Events proved that I was right in my supposition."

"That was very ingenious," I could not help admitting. "I must confess that the conclusions I drew from those few scribbled words were quite erroneous."

He smiled.

"You gave too much rein to your imagination. Imagination is a good servant, and a bad master. The simplest explanation is always the most likely."

"Another point--how did you know that the key of the despatch-case had been lost?"

"I did not know it. It was a guess that turned out to be correct. You observed that it had a piece of twisted wire through the handle. That suggested to me at once that it had possibly been wrenched off a flimsy key-ring. Now, if it had been lost and recovered, Mrs. Inglethorp would at once have replaced it on her bunch; but on her bunch I found what was obviously the duplicate key, very new and bright, which led me to the hypothesis that somebody else had inserted the original key in the lock of the despatch-case."

"Yes," I said, "Alfred Inglethorp, without doubt."

Poirot looked at me curiously.

"You are very sure of his guilt?"

"Well, naturally. Every fresh circumstance seems to establish it more clearly."