Memoirs of a Revolutionist by Peter Kropotkin

Every revolutionist meets a number of spies and "agents provocateurs" in his way, and I have had my fair share of them. All governments spend considerable sums of money in maintaining this kind of reptile. However, they are mainly dangerous to young people only. One who has had some experience of life and men soon discovers that there is about these creatures something which puts him on his guard. They are recruited from the scum of society, amongst men of the lowest moral standard, and if one is watchful of the moral character of the men he meets with, he soon notices something in the manners of these "pillars of society" which shocks him, and then he asks himself the question: "What has brought this man to me? What in the world can he have in common with us? " In most cases this simple question is sufficient to put one on his guard.

When I first came to Geneva, the agent of the Russian government who had been commissioned to spy upon the refugees was well-known to all of us. He went under the title of Count; but as he had no footman and no carriage on which to emblazon his coronet and arms, he had had them embroidered on a sort of mantle which covered his tiny dog. We saw him occasionally in the cafés, without speaking to him; he was, in fact, an "innocent" who simply bought in the kiosks all the publications of the exiles, very probably adding to them such comments as he thought would please his chiefs.