Central Siberian Plateau
In 1872, Czekanowski proposed to the Geographical Society to explore the area between Yenisei and Lena, which at the time was still a "big white spot" in terms of hyrodgraphy and relief. The company commissioned him to lead a small research expedition lasting two years, to which Ferdinand Ferdinandovich Miller was appointed to its staff as astronomer and physicist. From 1872 to 1875, the two explored Central Siberian Plateau.