There were some old Paris labels on one of the bags.

Somehow I couldn't get the fellow out of my head, and the very next time I had to go to Paris on service I spoke about him to that friend of mine in the Paris police.

My friend said: 'From what you tell me I think you must mean a rather well-known hanger-on and emissary of the Revolutionary Red Committee.

He says he is an Englishman by birth.

We have an idea that he has been for a good few years now a secret agent of one of the foreign Embassies in London.' This woke up my memory completely.