Czech composer, musical theorist, folklorist, publicist, and teacher (1854–1928) considered one of the most important opera composers of the first half of the 20th century. Ink signature and inscription in Czech on an off-white 5.5 x 3.5 postcard, (translated): “I will send / Yours faithfully devoted / Leos Janacek.” In fine condition. RR Auction COA.