Conversation so far:
What did Matthew Paris do as a historian?
Matthew Paris wrote a number of works, mostly historical, which he scribed and illuminated himself, typically in drawings partly coloured with watercolour washes, sometimes called tinted drawings.
What was the history that Matthew Paris' predecessors had followed?
After admission to the order in 1217, Matthew Paris inherited the mantle St. Albans' official recorder of events, in 1236.
what did Matthew Paris write about?
Matthew Paris' known activities were devoted to the composition of history. Naturalists have praised his descriptions of the English wildlife of his time.
did Matthew Paris write about anybody important in history?
Matthew Paris wrote about the lives of Emperor Frederick II, St Alban, Edmund of Abingdon, King Edward the Confessor, Edmund Rich, and Bernardus Silvestris.
did Matthew Paris receive letters from the people he wrote about?
Matthew Paris derived much of his information from the letters of important people, which he sometimes inserts, but much more from conversation with the eyewitnesses of events.
did Matthew Paris ever write about historical events?
Matthew Paris wrote a number of works, mostly historical, which he scribed and illuminated himself.
who was Henry in relation to Matthew Paris?
Henry III (1 October 1207 – 16 November 1272), also known as Henry of Winchester, was King of England, Lord of Ireland, and Duke of Aquitaine from 1216 until his death.
Did Matthew Paris have anything to do with King Henry?
Among Matthew Paris' informants was King Henry III, with whom he appears to have been on intimate terms.
Did Matthew Paris get recognized for his works?
Matthew Paris' Chronica Majora is an oft-cited source, though modern historians recognise that Paris was not always reliable. Naturalists praised his descriptions of the English wildlife of his time.

Question: When did he start writing
Self-contained rewrite: When did Matthew Paris start writing?