Autograph letter signed from Louis Barbon Manicini-Mazarini, duc de Nivernais, St. Maur, to David Garrick, 1766 July | WorldCat.org
Has received his letter of May 3, along with his pretty ode and two copies of The clandestine marriage, one for him and one for Mademoiselle de Rochefort. Has not yet shown the ode to Horace Walpole. Has not yet read the play, but plans to both read it and translate it when he has time