In my reply #11 on this thread I talked about the paucity of information about Bohemian cameo glass produced in the mid 19th century-http://www.glassmessages.com/index.php/topic,51272.msg292956.html#msg292956
I have just come across a book called 'Colonial homes and their furnishings' by Mary Northend. It was written in 1917.
In that book the following:
'At the commencement of the seventeenth century, some of the Bohemian manufacturers were producing vases of various shapes enriched with engraved ornaments, representing scenes, and frequently portraits. Some of the former type are shown in the wonderful collection owned by Mr. W. J. Mitchell at Manchester, Massachusetts. With the pronounced popularity of the Bohemian engraved vases, artists in other countries began decorating their ware in like fashion, those of France employing interlaced flowers. These were etched on, rather than engraved, however, and cheapened the ware; in other countries the results obtained were no better, all failing to compare with the Bohemian specimens, for the art of engraving here had been learned from long experience by workmen who were experts in their line.Many Bohemian pieces showed an original decoration in the way of ornamentations in relief on the outside, while the art of cameo incrustation was also first used by Bohemian workers, who sometimes varied it to obtain odd and pleasing effects by engraving through an outer casing of colored glass into an interior of white, transparent, or enameled glass.
One such specimen, a salt cellar, is shown in the Mitchell collection.'
So Bohemian cameo glass was acknowledged clearly in this book, and is clearly denoted as cameo glass, and the description of the process is clearly that of the cameo process.