REFN: 859 [GarlandPeter.FTW] [Brøderbund WFT European Origins Vol. E1, Ed. 1, Tree #0349, Date of Import: Jun 28, 2002] As an expedient method to keep alive, Charles the Simple, King of the Franks, offered a dukedom to include the Seine valley (Nuestria) to an invading Viking band under the leadership of Hrolf Ganger or Walker- terms that he converted to Christianity & he defend the area.