 In 1868 having become members of the First Internationale and then of the central committee of the 
League of Peace and Freedom, after the schism in the aftermath of the Berne Convention, Mroczkowski and Bakunin formed a group to oppose the ideology of Karl Marx.Mroczkowski was also involved in drawing up plans for the refurbishment of the villa, "La Baronata" perched above Lake Maggiore, a retirement retreat built for Carlo Cafiero, who initially "gave" it to Bakunin, but on discovering that his fortune was leaching away, was able to get it back.In 1869 they left Switzerland and travelled as a couple to London and for about two years moved there in revolutionary circles that included people such as Karl Marx and Walery Wroblewski

Since Prince Obolensky had forcibly abducted his children from his wife, Zoë, in 1869, her income dropped considerably.