As I live in Cambridgeshire I purchased Rex's book on Hereward and was surprised to find that a local post conquest landholder called 'Frederick' was given the additional title 'of Oosterzele-Scheldewindeke'.But the author failed to identify the source of this information. Likewise, in William the Conqueror, he once again refers to William I as having a step-daughter but most historians shy away from the fact that his wife Matilda ever bore a child before their marriage. But I am concerned with Rex's report on the rebellion of Earl Ralph 'of East Anglia'. This ended with his defeatat a place history records as 'Fageduna'. This location is unknown but is thought to be Fakenham in Norfolk. However, Rex has Ralph advancing across Cambridgeshire as far as Whaddon, a village near the Cambridgeshire/Hertfordshire border, but fails to explain where this information comes from. He then apparently retreats east to 'Fawdon(not far from Duxford) where after a brief skirmish he bolted back to Norwich...'. So 'Fageduna' is actually Fawdon in Cambridgeshire. But where is that? There is no Fawdon mentioned in the Domesday survey of 1086 or the contemporary Cambridge and Ely enquiries (ICC and IE). Nor are there any 'lost villages' of that name nor even a farm. Reaney's Place names of Cambridgeshire' has no mention of it. So please Mr Rex,for the benefit of a 76 year-old Cambridgeshire man, PLEASE identify your sources.