It is the quietest and meekest people who are often capable of the most sudden and unexpected violence for the reason that when their control does sn… - Agatha Christie

I suppose next time I come home I shall find you wearing false moustaches — or are you doing so now?'
Poirot winced. His moustaches had always been his sensitive point. He was inordinately proud of them. My words touched him on the raw.
'No, no, indeed, mon ami. That day, I pray the good God, is still far off. The false moustaches! Quelle Horreur!’
He tugged at them vigorously to assure me of their genuine character.
'Well, they are very luxuriant still,' I said.
'N’est-ce pas? Never, in the whole of London, have I seen a pair of moustaches to equal mine.'
A good job too, I thought privately.

True to the precepts handed down to her by her mother and grandmother — to wit: that a true lady can neither be shocked nor surprised — Miss Marple merely raised her eyebrows and shook her head,

The little grey cells, my friend, the little grey cells! They told me.