1To Benjamin Franklin from the Count of Belgioioso: Two Letters, 30 September 1772 (Franklin Papers)
AL : American Philosophical Society The Count of Belgioioso presents His best Compliments to Dr. Franklin and would take it as a particular Favour if He’d please to inform Him where the Person lives who makes the Glasses for the Harmonica according to His Invention: as the French Embassadour who is a great Lover of Musick and is desireous of having One enquired to The Count about this said...