Hello Colin, I spotted your request for CORDEROY family in Blewbury. I am a Berks watermill historian and and have some references to this family at Blewbury `Upper Mill` a.k.a. `Corderoy`s Mill`. I have Richard at the mill 1788. Joseph there 1847, `54 & `69. Justus there 1877 & 1895. 1911 to 1920 the executors of Justus were running the CORDEROY milling business. Hope this helps. I am a member of the `Mill Archive`, Watlington St, Reading, spending one day a week there. Anything further you may have on the mill and miller history would be appreciated. Kind Regards. Tom HINE.