From: Chapter Five (1757) of Benjamin Franklin in London (2016) by George Goodwin:
“…we know that the deist “Honest Whig” Franklin and the High Anglican Tory Dr Johnson did actually meet on at least one occasion. That was on 1 May 1760.
…What the two men had in common on this occasion…(was) their common humanitarian interest…Johnson had a personal interest, because Francis Barber, his servant, adopted son and finally his principal beneficiary, was black. As for Franklin…He was true to his principles, for when William’s absconding slave King was found to be in the good care of a Suffolk lady who was paying for his lessons and personally teaching him the violin and French horn, the Franklins were happy to leave him there.”
From: Chapter 7 (1758 Onwards):
“There was one English family, the Stevensons, who emotionally meant far more to (Franklin) than his English blood relations, though young Sally Franklin was also part of that because she was a member of Franklin’s household at Craven Street. Others whom Franklin brought into it at this time, of course, included his and William’s slaves. Though King left them early, Peter settled much better and soon got to know London through running Franklin’s errands. He would not have been at all conspicuous as a black person, because it has been estimated that there were 15,000 people of African origin living in London in the 1760s…
…When he received Polly’s letter, in the autumn of 1759, Franklin had just returned from a three-month trip with William and Peter to Scotland, via Derbyshire and the Lancashire towns…”