Browse Items (2 total) Tags: early mention of the triangle in writing Browse All Browse by Tag Search Items Browse Map Sort by: Title Creator Date Added Commonplace Book Tags: early mention of the triangle in writing, p Triangle Index Bon vivant. Libretto. German (1710) by Richard Keiser - libretto Tags: early mention of the triangle in writing, p Triangle Index, Pre-1800 writing for the triangle, SEE ALSO - Curt Sachs - Handbuch der Musikinstrumentenkunde, unique - early use in opera orchestra, unique - libretto, Wihelm Kleefeld - Das Orchester der Hamburger Oper 1678_1738 Featured Item Romberg’s Toy Symphony at St. James’s Hall