Diary of John Adams, volume 4
April 14. Tuesday 1778. I returned the Visits which had been made me by the American Gentlemen. This I found was an indispensable Punctilio, with my Countrymen in France. Great Offence had been taken by some of them, because Dr. Franklin had not very exactly performed this important Ettiquette, especially by those of them who had come over to Paris from England.