Now that war and the problems of war are things of the past, I think I may safely venture to reveal to the world the part which my friend Poirot played in a moment of national crisis. The secret has been well guarded. Not a whisper of it reached the Press. But, now that the need for secrecy has gone by, I feel it is only just that England should know the debt it owes to my quaint little friend, whose marvellous brain so ably averted a great catastrophe.
One evening after dinner—I will not particularize the date; it suffices to say that it was at the time when “Peace by negotiation” was the parrot-cry of England’s enemies—my friend and I were sitting in his rooms. After being invalided out of the Army I had been given a recruiting job, and it had become my custom to drop in on Poirot in the evenings after dinner and talk with him of any cases of interest that he might have on hand.