1851 Great Exhibition: Official Catalogue: Class X.: G. Church
From Graces Guide
514. CHURCH, G., 12 Berkeley Place, Bristol — Inventor.
Wrist-supporter, for securing a good position in playing the pianoforte.
Improved guitar: by means of two bars introduced within the instrument, and fixed in the blocks, greater strength is secured.
Improved finger-board for the violoncello, and other bowed instruments: groove runs the whole length of the finger-board under each string.
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