The 1891 census street index on TNA says that Colebrook Terrace was already part of Duncan Terrace then:
https://webarchive.nationalarchives....reet_Index_C-F
This is the start of Duncan Terrace on the 1891 census but I don't know which number would correspond to 13 Colebrook Terrace:
https://www.ancestry.com/interactive...2_166_169-0333