Thanks Mike. I have a special edition 1912 OS map which shows the premises at 89 slightly altered. And this map doesn't even label North Western Arcade, although we can clearly see it existed (and still does, but significantly different now). And Rackhams, which was then on the corner of Bull St/Corpn St, had started to extend into the NW Arcade by the 1900s. Maybe it was regarded as (or promoted as?) an extension of the GW Arcade. Even today not manly people are sure of where the NW Arcade is, but they are clear where the GW Arcade is. Bit of a ramble, but basically I wonder if the given addresses on this part of Corpn St/NWArcade varied. Just a thought. Viv.