History of Africa. 19th century. Group of indigenous Krumen from Biribiri. The name of Kroomen was given to the freed natives of all the tribes of Central Africa. That of Kruboys, to the natives of the Kroo Coast (Cape Palms), hired for a determined time rendering good services in the stations and factories. Engraving. El Congo y la Creacion del Estado Independiente de este nombre. Historia de los Trabajos y Exploraciones Verificados (The Congo and the Founding of its Free State. A Story of Work and Exploration), by Henry M. Stanley. Edited in Barcelona, ca. 1890. Spain.