. Catharine Macaulay's brother, John Sawbridge (1732?–1795), a founder of the Supporters of the Bill of Rights, had served as an alderman for
London since 1768. Later in 1774, he was returned as a member of Parliament for the
). Rev. Ewin may have been the notorious Dr. William Howell Ewin (1731?–1804) of Cambridge
). Dr. Hugh Williamson (1735–1819) of Pennsylvania had sailed to Europe from Boston shortly after the Tea Party of Dec.
1773. On his arrival in England, he struck up a friendship with Franklin and became
his scientific collaborator (