Simplify the following text for a Grade 8 native English-speaking person.
Original: Bolsover is mentioned in Domesday Book , named as Belesovre , where it is described as the property of William Peverel ( or `` Peveril '' ) .
Simplified: Bolsover is mentioned in Domesday Book , where it is described as the property of William Peverel ( or `` Peveril '' ) .