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After travelling through the Caucasus, Bulgakov headed for Moscow, intending "to remain here forever". It was difficult to find work in the capital, but he was appointed secretary to the literary section of Glavpolitprosvet (Central Committee of the Republic for Political Education). In September 1921, Bulgakov and his wife settled near Patriarch's Ponds, on Bolshaya Sadovaya street, 10 (now close to Mayakovskaya metro station). To make a living, he started working as a correspondent and feuilletons writer for the newspapers "Gudok", "Krasnaia Panorama" and "Nakanune", based in Berlin. For the almanac "Nedra", he wrote "Diaboliad", "The Fatal Eggs" (1924), and "Heart of a Dog" (1925), works that combined bitter satire and elements of science fiction and were concerned with the fate of a scientist and the misuse of his discovery. The most significant features of Bulgakov's satire, such as a skillful blending of fantastic and realistic elements, grotesque situations, and a concern with important ethical issues, had already taken shape; these features were developed further in his most famous novel.