Hi Cougar,
So sorry that you had to spend an hour looking for Joseph Deaton without success.
The only other brother that I can find was a William, another common name.
I couldn't find Joseph in the 1881 census either, but he does appear in the 1901 census. I've just thought, he married his second wife in 1881, the March quarter so maybe they were holidaying somewhere, he wasn't short of a bob or two. My sister-in-law had no luck when she went to Somerset House many many years ago. We wonder if the records were destroyed in the War, or as you say the name was mistranscribed.
The only other bit of information was that Joseph Deaton born 1832 might have been something to do with the Bryant Box Manufacturers. He certainly wasn't poor like the rest of the relatives.
Thank you so much again for your time.
Peachface