1891 census lists no. 2 (first house) and before it Love Lane, so that may imply that the numbers went low to high from Love Lane to Lister St. If so then no. 18 would be on the left. Also the houses appear to only go up to no.19, so if they were the other way round then there should be higher numbers.
Map (from 1889) seems to match the picture, cross being the first house shown and the line in front of the taller houses...
View attachment 187232
So perhaps no. 10 was the first of the smaller houses on the far right (door and window) in the photo and no. 9 next (window only). The first (or last) 2 houses of Lister Place on the map.