said Poirot, looking after her, “goes a very valuable ally. That woman, Hastings, has got brains as well as a heart.”
I did not reply.
“Instinct is a marvellous thing,” mused Poirot. “It can neither be explained nor ignored.”
“You and Miss Howard seem to know what you are talking about,” I observed coldly. “Perhaps you don’t realize that I am still in the dark.”
“Really? Is that so, mon ami?”
“Yes. Enlighten me, will you?”
Poirot studied me attentively for a moment or two. Then, to my intense surprise, he shook his head decidedly.
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?”