Simplify the following text for a Grade 8 native English-speaking person.
Original: Arrived at this stage of development , the Annals now began to lose their primitive character , and henceforward became more and more indistinguishable from the Chronicles , though the term was still used for many documents , such as the Annals of Waverley .
Simplified: At this stage , the Annals now began to lose their primitive character , and became more and more Chronicles . But the term was still used for many documents , such as the Annals of Waverley .