1851 Great Exhibition: Official Catalogue: Class X.: Richard Beard
From Graces Guide
292. BEARD, RICHARD, 85 King William Street, City — Producer and Patentee.
Photographic pictures by a new patent process, whereby daguerreotypes are "enamelled."
[The enamelling referred to would appear to consist in removing the glare of the polished plate by a transparent covering, resembling a varnish. The present method of fixing a daguerreotype picture is by gilding, with a solution of the hypo-sulphite or chloride of gold.—R. E.]