Note 24 — II. The Early Middle Ages. A.D. 476–1066–81.
Reading edition
See in the Roman de Rou, ii. 262:--
‘Hoem ki od hache volt ferir, Od sez dous mainz l’estuet tenir. Ne pot entendre a sei covrir, S’il velt ferir de grant aïr. Bien ferir e covrir ensemble Ne pot l’en fair ço me semble.’