Few writers left their marks during the period following the fall of the Roman Empire. Written records during this time are few [55 BC - 871 AD], and the events of the day are not well understood. Peter Hunter Blair provides a brief and very readable account of this early period in the history of the people that occupied the Island after Rome pulled out.
In my growing up days, it was generally known as "The Dark Ages". It took me some time to realize that the same sun shown brightly on these folks that gave the light to my own Kentucky home. [You know, the sun shines bright...on my "old Kentucky Home".] Anyway, the book was published in 1966 by the Norton Library, and its major view is to present the rise of Anglo-Saxon England. Of course those of us with Welsh, Irish, and Scottish lineage will have to dig a little deeper. [There is a good discussion of Offa's Dyke at Llanfair, Shropshire staring p. 229]
Knowledge and understanding of this period in the family tree is one foundation to our JONES surname. This book provides an avenue to the window of time for the time traveler.