Does anyone know where to find a map of the ward boundaries in Saint John, NB, at the time of 1901 Canadian Census?

I have been seaching in the 1901 Census microfilm of Saint John City, looking for my great-grandfather James JOHNSTON (b. 1854/5 Orkney Islands, Scotland; d. 1932 Saint John, NB) and his family.

I know that in 1900 he lived at 152 Douglas Avenue (Parish of Portland, which I believe had been incorporated into Saint John by that time).

Thanks for much for any help you can offer!