Aristide CAVAILLÉ-COLL (1811-1899). L.S., Paris, May 22, 1867, to Eduard Hanslick, "member of the International Jury"; 1 1/2 pages in-4, on the letterhead of his Manufacture d'orgues d'église et de salon. Aristide Cavaillé-Coll.... 2 l.a.s. to Hanslick from Charles Beauquier are enclosed. He sends him several brochures that will inform him "about the inventions and improvements I have made in the building of great organs. He regrets that he cannot "visit the great organ of St. Sulpice" and would be happy to meet him... We enclose 2 l.a.s. to Hanslick by Charles Beauquier (1866, about his book Philosophie de la Musique), and Gustave Chouquet (1878, about the musical instrument competition at the Universal Exhibition).