An online chart of musical symbols that has proved to be very useful can be found here:
Michel Corrette was a French composer and an author of method books. His methods for instruments included the violin, cello, bass, flute, recorder, bassoon, harpsichord, harp and mandolin, and provide invaluable information on performance practice of the 18th century.
The methods covered contemporary English music, the differences between French and Italian styles, and the art of vocal accompaniment on the harpsichord. Corrette’s Method of 1772 for mandolin is one of the most thorough of the methods written during this period.
The LME blog
Players, music and plucked strings.