1851 Great Exhibition: Official Catalogue: Class X.: B. W. Dobrowolski
524. DOBROWOLSRI, B. W., 20 Norton Street, Portland Place — Inventor.
Semibreve guitar. This newly-invented instrument is improved from the Spanish guitar: its advantages are, that it contains one octave and a half more in the treble, and that it is more easy to play; the sounding-board is larger, and produces very powerful and melodious notes, and the instrument can be held with great ease and grace. Registered.