I stumbled in wikipedia upon a lovely story about a man called Asselin FitzArthur who stopped the burial proceedings of William the Conqueror in Caen, claiming that the church stood on land that had been illegaly seized by the late king from his family. His claims won support and the burial was resumed only after he was properly reimbursed.
What is the origin of the story? Some googling only led me a poem and a boys' novel, both from Victorian England. I'd like to know from which chronicle the story came.