Edmond George Fitzmaurice, Dictionary of National Biography… (1899)
“ Like all the followers of Lord Shelburne, he sided with the colonists in their struggle with the mother country, and his political as well as his religious sympathies brought him into intimate relations with Price, Priestley, Paine, and Horne Tooke during the American war and the French revolution. In June 1782 he was sent to Paris to give private assurances to Franklin that the death of Lord Rockingham and the accession to power of Lord Shelburne had caused no change of policy in regard to the intention of recognising the independence of the United Colonies. ”
