I am using the existing 'Back to Backs' in Hurst Street, run by the National Trust, as my visual reference, as well as contemporary photos of slum housing in Birmingham..
The border design will be taken from wallpapers that were found when the NT renovated the Hurst Street houses. Layers of papers have been dated and attributed to the specific families that lived in the houses at the time.
I particularly like the one above that was from about 1880 (Gardner Family). It looks like a camillia or similar and would work well as a border design.
John's clothes and pose are taken from production stills from 'Ripper Street' .