We think this visage probably represents an ancient sage, probably Greek or Roman: Socrates, Homer, etc., but which one?
Site: Bust at Holland House - unknown (1 memorial)
W8, Holland House
You can just see this bust in our photo, high up in the tower, which can be seen in its undamaged state in this Library Time Machine post on Holland House. We doubt this was where the bust was originally situated, but nor does it seem to match any of the busts shown in the Library Time Machine's photo of the bust-lined conservatory.