Hi Al
Thanks for responding. I had tried Historical Directories and found the number 9 limit as you mention.
Sorry, I should have pointed out that my grandfather only appears to have been visiting Bath and therefore his name is not recorded anywhere as an occupier.
I find it strange that he could have made such a mistake in address, unless he did not want his whereabouts identified!That is always a possibility, given what I know of his circumstances at the time.
Regards
Cynfran