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My late mother was a Dockree. My brother, who died suddenly last year, did much research into the Dockrees, including Dockwra and other spellings. I have all his notes, etc, but have not yet put them into any order, Also I am away for a week from tomorrow. I will have a look and get back to you with any info on Dockwra's which I can find in my brother's files. Sorry, it won't be for a week or 2, but will try to help.
I did actually start up a Dockree slot on this website, before Raymond died, but did not get back to it and they cancelled it!