"The Year 1000" by Lacey and Danziger explains this well in slightly more detail, with some references, for anyone that would like to learn more. The other refe

"The Year 1000" by Lacey and Danziger explains this well in slightly more detail, with some references, for anyone that would like to learn more. The other reference I have on the shelf that I will check for this is David Crystal's "The Stories of English". Any other good references out there?