Autograph letter signed by François Vidocq, dated in his hand November 12, 1837, on a double leaf, with the autograph address of the correspondent on the fourth page "Monsieur Pujol ancien directeur des Postes de Vendôme à Gournay, Enbray [Gournay-en-Bray] (Seine-Inférieure)". Numerous usual folds.
Fine printed letterhead detailing the services offered by his private detective agency: "20 FRANCS PAR ANNEE, Et l'on est à l'abri de la ruse des plus adroits fripons !" [for 20 francs a year, one is protected from the most cunning of scoundrels!] It bears the address of his agency, recently relocated to "Rue Neuve St Eustache, N°39" (manuscript notation). Vidocq had retained his former offices at "Rue du Pont-Louis-Philippe, N°20" (printed letterhead).