Pierre PUVIS DE CHAVANNES (1824-1898). L.A.S., July 18, 1897, to Henri Mazel; 1page in-12, address on verso (letter-card). He writes back "on the way to treat monuments that time has tested; I think one cannot be too considerate and respectful of what it has spared, and only add one stone to them to save ten"... 2 other L.A.S. enclosed, June 12 1866 and January 1 1887 (to Léo Delibes).