Complex sentence: Buckler also served as secretary to Henry VIII's sixth wife, Queen Katherine Parr as a letter dated 8 August 1544 refers to him as' Mr Buckler, the Queen's secretary'.
Split into simpler sentences: Buckler also served as secretary to Henry VIII's sixth wife, Queen Katherine Parr. A letter dated 8 August 1544 refers to him as' Mr Buckler, the Queen's secretary'.