See COVE Master Map entry on Buckingham Palace: 

https://editions.covecollective.org/place/buckingham-palace

In London Labour and the London Poor edition: 

Phase 1

A Balloon View of London (The Great World of London): "That little building, no bigger than one of the small china houses that are used for burning pastilles in, is Buckingham Palace - with St. James's Park, dwindled to the size of a card-table, stretched out before it. Yonder is Bethlehem Hospital, with its dome, now of about the same dimensions as a bell."