Kobbe, Gustav - Autograph Letter Signed

American musical critic and author (1857-1918), best known for his guide to the operas, "The Complete Opera Book" first published in the United States in 1919 and the United Kingdom in 1922. Autograph letter signed, 5 pages, dated in March 1918, size of each page is 8 x 9.75 inches, small tear on left side of final page, otherwise in very good condition.