Two vintage libretti: Light Opera Librettos, Die Fledermaus  (The Bat) by Strauss, German and English Text, 40 pgs., 1.5" tear on top right side of cover. Der Fliegende Hollaender (The Flying Dutchman ) by Wagner, Season of 1929-1930. Mr. S. Hurok presents the Second American Tour of The German Grand Opera Company, German and English Text, 32 pgs. Cover corners have small faint fold marks, back cover top edge has two small tears. Both published by Oliver Ditson Company, Boston, USA, size: 6.75x9", Good Condition. Opera HIstory from the last year before the Great Depression, the legendary Saul Hurok, impresario....Side by side English and German text. PAge at back of The Flying Dutchman has profile of Sol Hurok Impresario and the Hurok Management Company artists.