"Three faces of Mihailo Petrović as a fishery master on the Sava and the Danube rivers. Petrović maintained an extensive correspondence with the world. He used his own seal to secure a postal package or an envelope. His stamp depicts a ""fish eating a fish"" with MP initials, hardly a coincidence (the stamp was made in Paris, of silver and yew tree wood, Taxus baccata, in 1898). (Collected Works, Book 14) (Digital Legacy of Mihailo Petrović)"
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