Hello both,
I thought I had your houses pin-pointed because of Glebe Road and the market garden. I used to live in Saltersgate Road, which is the next one to Glebe Road. Between me and the main-line railway there was a smallholding with a much older house. Then I had another look at the old maps and now I'm not so sure. Glebe Road leads to what was Glebe Farm (beyond that was a Golf Club, but not in the same location as the present Darlington Golf Club). Glebe Road runs off Salters Lane not the Back Lane, then I noticed another Glebe Farm which was on the Back Lane (they don't like to make things too easy for us, do they?) there weren't many other houses around so perhaps 140-146 were all associated with Glebe Farm.
The location is now housing which I think is Lyonette Road.
I don't know if the enumerator's instructions are available for 1911, but they might help.
Regards,
Colin