celebrity gossip, nineteenth-century edition

[swan_tower]

I don't suppose anybody can tell me the location of the party on the fifth of June, 1833, at which Ada Byron first met Charles Babbage? Passages doesn't say, nor does The Enchantress of Numbers, but I'd like to know so I can properly set this scene. I know Babbage invited her to see the Difference Engine a few weeks later, and that was at his house, but I doubt that's where they met.

Edit: Looks like it was at Mary Somerville's house in Chelsea -- but if anybody can tell me where in Chelsea, that would be fantastic.