Music, according to Jefferson, was his “favorite passion” and the violin his preferred instrument. Jefferson was schooled in music at an early age and cultivated his love of music throughout his life. As an accomplished violinist and music aficionado, Jefferson owned four violins, including a so-called “kit,” an instrument small enough to fit neatly into a coat pocket. He was known to take his kit along on his travels to practice while away. At home, he could play his other instruments as well as consult his personal copies of contemporary musical treatises such as this one by Francesco Geminiani. Jefferson rarely wrote in his books, but this book includes Jefferson’s inscription of Charles Burney’s discussion of violin technique.