It seems very likely that this Robert George Back is my great grandfather. I have been on the census 1901 web site and found George Back 32yrs from Essex Stratford married to Florri 28yrs from London Camberwell They had 2 children by the time of this census Lilli Back4yrs born in Essex Stratford and Robert 2 yrs born in London Bromley. They lived at 13 Norris Rd which matches the birth certificate that you have. Is there any chance that you could send me a copy of this birth certificate and do you know of any connections to this family? I have never heard of my grand mother having any aunts, but maybe there are more?