Hi,
This is getting interesting now, yes this Hubert is the Postman in 1911, I have a lot of help on my tree from a friend who is a Geaneologist, the nearest match we can get for 1901 is: "Possible match under the name Robert Johnson living in West Ham as a boarder ages 22 years a Boiler maker born Warrington-not confirmed"
All My Johnsons are in the North West, and my Mum was untill she moved here to North Wales.
I have birth of Stephen, cunsus 1851-1881, death 1888, and death cert, unable to find any marraige though, but on census Selina is listed as "Wife"
Yes I did know I was descended from Gypsies, but only when I discovered Reservoir, I have not spoken to the rest of the Johnsons yet about the Gypsies, so don`t know if they are aware, but my mum was shocked and refused to believe me at first.
I have quite a bit for William, and a death cert for Reservoir, like you no parents names............the biggest problem we found researching the Drewery side, there were so many alternative ways to spell the name, Drewery, Drury, etc.
Now I know your information is correct I will fill in my missing pieces, let me know if there are any pieces of information you require and I will see what I have, but know for sure I have not got as far back as you on the the Reservoir line.