Upon arrival at places of settlement, exiles had to comply with extensive regulations under a strict governmental regime. Local police watched, regulated, and notated every move that Decembrists attempted to make. Dimitri Zavalishin was thrown into prison for failing to remove his hat before a lieutenant. Not only were political and social activities carefully monitored and prevented, there was interference regarding religious convictions. Local clergy accused Prince Shakhovskoi of "heresy", due to his interest in natural sciences. Authorities investigated and restrained other Decembrists for not attending church. The regime thoroughly censored all correspondences, especially communication with relatives. Messages were scrupulously reviewed by both officials in Siberia and the Third Division of the political intelligence service at Saint Petersburg. This screening process necessitated dry, careful wording on the part of Decembrists. In the words of Bestuzhev, correspondence bore a "lifeless...imprint of officiality." Under the settlement regime, allowances were extremely meager. Certain Decembrists, including the Volkonskys, the Murav’yovs, and the Trubetskoys, were rich, but the majority of exiles had no money, and were forced to live off a mere 15 desyatins (about 16 hectares) of land, the allotment granted to each settler. Decembrists, with little to no knowledge of the land, attempted to eke out a living on wretched soil with next to no equipment. Financial aid from relatives and wealthier comrades saved many; others perished.