 In the chapter "De Rusia sive Ruthenia, et recentibus Rusianorum moribus" ("About Rus', or Ruthenia, and modern customs of the Rus'"), Boemus tells of a country extending from the Baltic Sea to the Caspian Sea and from the Don River to the northern ocean.It is a source of beeswax, its forests harbor many animals with valuable fur, and the capital city Moscow ("Moscovia"), named after the Moskva River ("Moscum amnem"), is 14 miles in circumference.Danish diplomat Jacob Ulfeldt, who traveled to Russia in 1578 to meet with Tsar Ivan IV, titled his posthumously (1608) published memoir "Hodoeporicon Ruthenicum"
("Voyage to Ruthenia").