Around 1091, Roger's brother-in-law Boso died, but Roger was apparently preoccupied with Norman and English affairs, and his wife's uncle Odo became count of La Marche. In 1092, Roger acquired a large part of what is now northern Lancashire. These grants gave Roger effective control of all the lands north of the River Ribble to the
River Lune, which formed a natural border between the secure Norman lands in England and the strongly contested Scottish frontier lands in
Cumberland. Due to long established lines of communication across
Morecambe Bay, Roger also assumed authority over the regions of
Furness and
Cartmel; these remained a part of Lancashire until as recently as 1974. The expansion of Roger's lands followed his support of
King William II Rufus's invasion of Cumbria in 1092, where
Dolfin of Carlisle ruled, possibly as a vassal of Scottish King
Malcolm Canmore. Dolfin was driven out and the Anglo-Scottish border was established north of
Carlisle. Roger also acquired the great
honour of
Eye centered in
Suffolk. ==1088 and after==