Source 1 starts by "setting the scene" it, describes what is happening, on the date 5th of January 1066, and it tells us how king Edward died, and had left the throne to Harold Godwine Earl of Wessex. This day was also known as holy innocents day, and on this day the Abbey of Westminster was consecrated or blessed. The source also tells us how Norwegians and English troops had already fought. Earl Morcar, and Earl Edwin had fought the Norwegians, and had been Defeated. Earl Tostig had 60 ships, and Edwin had a large...
Crowland.

This source is clearly different from the other sources, it is firstly set out in a different style, and the written style is different. It describes how William controlled England and crushed conspiracies planned to overthrow his rein, and attempted to calm England down by forming alliances.

It seems much less expressive of the opininions of the writers that the previous sources.

These differences could be the influence of many things, the occupation of England by Norman troops is the main cause because material biased against William would be destroyed and the monks punished.