Complex sentence: Thorndon now abandoned any effort to mediate and declared himself firmly on the Talbot side, producing a string of complaints against Ormonde and Chevir, covering a wide range of instances of corruption, bribery, maladministration, and disobedience to the Crown.
Split into simpler sentences: Thorndon now abandoned any effort to mediate and declared himself firmly on the Talbot side. He produced a string of complaints against Ormonde and Chevir, covering a wide range of instances of corruption, bribery, maladministration, and disobedience to the Crown.