Thank you Mike, for this very interesting information. Someone once told me that if you take the time and trouble to look into it, EVERYTHING is interesting, and this certainly proves it. I shall take a look at that museum the next time I go to Bath, and will also look out in Cheltenham for some of the older boxes when I next go. I still think it's a pity that Birmingham got rid of that box in the Bull Ring - they can't ever leave things alone in this city can they?