Complex sentence: However, as his biographer has said, Exton "continued to co-operate closely" with Brembre, and under Exton's jurisdiction, in 1387 the common council authorised the burning of the books containing the reform legislation of John Northampton.
Split into simpler sentences: However, as his biographer has said, Exton "continued to co-operate closely" with Brembre. Under Exton's jurisdiction, in 1387 the common council authorised the burning of the books containing the reform legislation of John Northampton.