Sibir

WHEN Ivan the Terrible, Tsar of Muscovy, Lord of Novgorod, and of Sibir, died some twenty years before, he left in the world two sons—an elder, Feodor and a lusty youngster Dmitri.

1926 December 8, Harold Lamb, “The White Falcon and the False Dmitri: Harold Lamb’s New Complete Novel of the Cossacks, The Wolf Master”, in Arthur Sullivant Hoffman, editor, Adventure, volume LX, number 5, New York, N.Y.: Butterick Publishing Company, →OCLC, chapter II (The Tale of Batko Andriev), page 10, column 1

Catherine the Great’s rule of thirty-four years was a period of expansion. Russian exploration and colonization spread through Sibir to North America, and the Russians occupied Alaska. […] After the mysterious death of Alexander I (many people believed he hid himself in Sibir for a number of years under the name of Theodore Kuzmitch) his younger brother, Nicholas, became the Emperor of Russia.

1940 May–June, A[lexey] M[ikhailovich] Uzefovich, “Russia in the Past”, in William Bowie, editor, The Military Engineer, volume XXXII, number 183, Alexandria, Va.: Society of American Military Engineers, →ISSN, →OCLC, pages 159–160