From Thomas Jefferson Encyclopedia
Francis (Francesco) Alberti ( ? – 1785) was a musician from Faenza, Italy. He came to the colonial capitol of Williamsburg with a "troop" of musicians who played regularly for festivities at the Governor’s Palace and other sites in the area. He caught the attention of Thomas Jefferson, then a student at the College of William & Mary, who employed Alberti as a violin tutor. Alberti is also said to have tutored the future Mrs. Jefferson, Martha Wayles Skelton, on the harpsichord.
Once established at Monticello, Jefferson invited Alberti to visit him there, where Alberti continued to tutor Jefferson, his wife, Martha, and other members of the Monticello household; Alberti also taught dancing to other nearby residents, including James Madison.
Even after hearing some of the finest musicians and composers of the day during his years in Europe, Jefferson still retained a fondness for Alberti. He told Nicholas Trist that he had heard the great violinist Viotti many times, but “never derived the same pleasure from him that I have from Alberti.”
Little more is known of Alberti. On August 5, 1785, a friend in Richmond wrote to Jefferson, "By the bye old Alberti died and was interrd last night here. He was one of a Band of musick to whom I have subscribed tho never heard them, at all; they surpass in execution, hardly the Jews Harp and Banjer performers."