Photography has become a household word and a household want; it is used alike by art and science, by love, business, and justice; is found in the most sumptuous saloon, and in the dingiest attic—in the solitude of the Highland cottage, and in the glare of the London gin-palace—in the pocket of the detective, in the cell of the convict, in the folio of the painter and architect, among the papers and patterns of the millowner and manufacturer, and on the cold brave breast on the battlefield.