1914 advertisement by Rhodes Island Music Company for mandolin sheet music by Giuseppe Pettine, including his Modern Mandolin School (in 4 volumes containing French, German, Italian and English). Volume III, "Duo style of Mandolin Playing". Volume IV "Modern System of the Plectrum's Mechanism". Also advertised was "Fundamental Principles of Mandolin Playing" (for beginners) and "Duo Primer" (for beginners in the duo style).