Dear All
Thanks for the info supplied! Sorry about the duplicate post I thought I'd posted the first question to the wrong forum!!
As to Tina's question, yes John Vorwerg Dobson did die in Liverpool in 1925, however by then (because of the post Franco-Prussian war anti Germanic feelings) he had Anglicised his name to John William Dobson, this happened around 1873-77.
I'm looking forward to my visit back to my roots, it must be the year for it as only four weeks ago I was in Glasgow and visited the house where another set of Great Grandparents married.
Cheers again