Simplify the following text for a Grade 7 native English-speaking person.
Original: Soon after , the Jesuit priest Oswald Tesimond told Garnet he had taken Catesby 's confession , in the course of which he had learned of the plot .
Simplified: Oswald Tesimond , a fellow Jesuit had told him . Robert Catesby confessed them to Tesimond , and gave him the permission to tell Garnet .