Thanks Gartonite. Yes, Gelsenkirchen and the Ruhrgebiet was well and truly flattened. My late mother was sent away as a refugee with her school to Bavaria during the war.
Where did you find this 1900 residence information?
Following a lead from davecapps (thanks again) the Dortmund Adreßbuch 1900 lists a completely different set of Fausts
For years I have been trying to find out what happened to my great grandfather Johann(es) Faust b1869 in Gelsenkirchen who may have been murdered in about 1904, possibly during a trip to the USA, though he didn't emigrate there permanently. According to my Grandfather's marriage record his deceased father lived most recently in Dortmund but despite trawling through endless death registrations in Dortmund and Gelsenkirchen around 1904 I have been unable to find anything. Every now and then I try a different angle.
This time I'm trying to find evidence of where Johann, his wife Wilhelmine and their children might have been living between 1900 and 1905 which might indicate when and where Johann disappears from the records so I can at least narrow the date and place down in what was a heavily populated area.