Simplify the following text for a Grade 4 native English-speaking person.
Original: The Domesday Book notes the use of a cucking stool at Chester , a seat also known as cathedra stercoris , a `` dung chair '' , whose punishment apparently involved exposing the sitter 's buttocks to onlookers .
Simplified: The Domesday Book mentions the use of a cucking stool in the town of Chester . The stool was also known as cathedra stercoris .