The Anglo Saxon Chronicle.
This work is commonly known as the Saxon or Anglo-Saxon Chronicle and consists of a chronological record of important events, chiefly relating to the English race, from the earliest period of the Christian era to the 12th century. It is of a composite character, and has been preserved to the present day in the form of six more or less complete ancient MSS., some of which appear to be independent of each other though traceable to some common original, whilst others are apparently more nearly related by obvious similarities.