Simplify the following text for a Grade 8 native English-speaking person.
Original: Charles R. Knight , a former friend called , `` Cope 's mouth the filthiest , from hearsay that in ( Cope 's ) heyday no woman was safe within five miles of him . ''
Simplified: Charles R. Knight , a former friend , said that Cope 's language was so filthy that `` in ( Cope 's ) heyday no woman was safe within five miles of him '' .