Conversation so far:
Can you provide me with a little more information on the instrumental music?
Rameau is one of the two masters of the French school of harpsichord music.
Was Rameau successful as a master of the French school?
Rameau's three collections appeared in 1706, 1724 and 1726 or 1727.

Question: Can you tell me how many people were apart of the French school?
Self-contained rewrite: Can you tell me how many people were apart of the French school of harpsichord music?