Complex sentence: The manor of Glevering, or Glavering, which appears to have been a hamlet to Hacheston, was in the time of the Conqueror in the possession of Herveus Bituricensis, and William de Malet also had a considerable estate there.
Split into simpler sentences: The manor of Glevering, or Glavering, appears to have been a hamlet to Hacheston. In the time of William the Conqueror, it was in the possession of Herveus Bituricensis, while William de Malet also had a considerable estate there.