This submission was sent in by eastbayray: "Unfortunately, the barmaid [did not know] if Sir Charles Napier is related in any way to Alan Napier of TV's 'Batman' fame. Nor [did she know] anything about Sir Charles Napier, for that matter. Nonetheless, she was quite pleasant, and the cask ales were delicious."
The barmaid may not have even known about this remarkable installation.