Continuing with my magical/Hughes related theme: the last time I was in Berkeley Square, I was trying to figure out where the vault of the Hermes Temple might have been destroyed; a passing mention of its destruction in Ithell Colquhoun's Sword of Wisdom says it was stored in Berkeley Square and destroyed in 1964.
The Vault would have been a septagonal wooden room with esoteric symbols painted on every surface. The Museum of Witchcraft in Boscastle have a picture of one towards the bottom of this page. That one, in Havelock North, New Zealand, would have looked very similar to the Bristol Hermes vault, I think, as they were contemporary Stella Matutina vaults and they were probably each at least partly designed by Robert Felkin, who emigrated from Bristol to New Zealand to form the Smaragdum Thalasses temple there.
GPS Coordinates:
51.45555, -2.60635
Location: Brandon Hill