Phew - slight panic!
I suddenly wondered whether I should have posted this - I know pretty well most facts re. Joseph Thomas Purkis, and don't really need any help. But then I reassured myself by re-reading Gwynne's advice saying that even if you know about your ancestor you can post so the search engines pick it up.
The one thing I would like to know is where he is buried (or whether he was cremated).