found: Schule der Technik des Harfenspiels, 190-?:title page (August Tombo)
found: Wikipedia, December 13, 2013(August Tombo; August Tombo (1842-1878) was a German harpist; since 1861, he was the harpist of the Court Opera in Munich; he also taught music at the Royal School of Music in Munich; he taught piano to Richard Strauss starting in 1868, and wrote a method to play the harp)
found: bayerischen musiker lexikon online, December 13, 2013(Tombo, August; born January 13, 1842 in Erfurt; died May 14, 1878 in Gries/Bolzano; harpist, piano teacher and court musician in Munich and Bayreuth)