sentences:  In 1849 he began giving instruction in geography to Prince Albert of Prussia (1837–1906), and soon afterwards gave lectures on military geography at the "Allgemeinen Kriegsschule".From 1855 to 1860 he performed geographical and cartological duties in Gotha, then returned to Berlin, where in 1867 he was appointed "Abtheilungschef" (division chief) to the Prussian General Staff.In 1870 he attained the rank of Colonel, and died three years later in Berlin due to cholera.