[Léon DELAFOSSE (1874-1951)]. Approximately 65 L.A.S. addressed to him, 1914-1937 and n.d.; numerous envelopes. Important friendly and social correspondence addressed to the pianist admired by Proust. Most letters are addressed to Switzerland; Delafosse lived in Caux s/Montreux, Glion and Territet to care for his frail health. They deal with music and Delafosse's art, but also with the social circle in which he moved, the Tout-Paris dispersed by the war, friends at the front or killed, Swiss society around the Bartholonis, etc. B. and S. Bacheracht, Geneviève Costa de Beauregard née Balorre, composer Jean Bartholoni (4 on his music), Marie Jeanne Bartholoni (7), J. Baud-Bovy, Z. Beddington, Gilone de Bioncourt née Harcourt (15 long letters), comte Fleury, comte de Germiny (5), Victor Gille (praising the music of his "dear Genie"), princesse de Ligne (3), Pauline princesse de Metternich (4, from Vienna during the war), Alexandre Moriaud, Marie de Rohan-Chabot princesse Lucien Murat, Jean-Luc Naville, Denise de Reverseaux, Herminie de Verteillac duchesse de Rohan (4), Charles-Marie Widor ("La campagne contre W[agner] produit l'effet inverse, naturlich!"), etc. Enclosed is a framed photo of Thomas Vinçotte's Sainte Cécile, dedicated on the back by Sophie Romberg née Vaucorbeil.