Victor BALTARD (1805-1874) architect. L.A.S., March 8, 1858, to Aristide Cavaillé-Coll; 1 page in-8, address. One joins L.A.S. of Léon Breuil, Gabriel Davioud and Hippolyte Moreau, and an autogr. business card of Paul Gasq. About the organ case of the Saint-Louis d'Antin church, for which Cavaillé-Coll built the organs in 1858. "One of the necessities that we did not think of in the combination of our organ case is the operation and location of the clock, which is indispensable for the service. I would ask you to take this into consideration and to come to an agreement with Mr. Collin, the clockmaker of the factory...".