Note Sleep’st by the fable of Bellerus old — MILTON’S MINOR POEMS.
Reading edition
160. Sleep’st by the fable of Bellerus old. The fable of Bellerus is the fabled Bellerus, or Bellerus of the fable. He was a mythical giant of Cornwall in old British legend. Bellerium was the name given to Land’s End, where he was supposed to live.