 While staying on Ischia with Bakunin in 1866, Mroczkowski together with his now partner, Zoë, produced a French translation of the Revolutionary Catechism, Bakunin's founding text for the secret "international revolutionary society" they were planning.Bakunin's Pet name for Mroczkowski was the affectionate diminutive, "Mrouk".In Polish ""mruk"" means the "grunter" or the "silent one".