Moving around Europe, acclaimed as each new book appeared--"Le Perroquet Vert" (1923), "Catherine-Paris" (1927), "Au bal avec Marcel Proust" (1928)--Marthe gravitated toward political power more than anything else. Without forgetting the former Kronprinz, Marthe had a short love affair with Alfonso XIII of Spain, and another with the French Socialist representative Henry de Jouvenel. In the latter case, the class differences shattered their relationship, something that Marthe used as the basis of her novel "Égalité" ("Equality", 1936). The Prime Minister of the United Kingdom, Ramsay MacDonald, found her fascinating. She visited him often in London and was his guest at Chequers. He wrote many touching, tender letters to her. Their close friendship ended only with his death.