Note 179 — Chapter XII · THE LATER REIGN OF WILLIAM IN NORMANDY.[159] 1051–1066.
Reading edition
In the Chronicle of Lambert of Saint Omer, 1067 (Pertz, v. 66) he is distinguished as “Baldwinus Comes Insulanus” from his son “Baldwinus Montensis.” So in the Continuation of Sigebert, vi. 433.