Shouldn't this be either Benjamin Franklin's house or Benjamin Franklin House, if that was the intent behind the capitalisation?
Talk about it here.
The house was situated not far from the future site of the Charing Cross station. Margaret Stevenson was the landlady of the house. Later this house became a museum dedicated to Franklin, which is how the First Doctor was able to find it with Steven Taylor and Vicki in order to secure Franklin's help. (AUDIO: The Founding Fathers)