... this debate has uncovered a mistake in a publication ...
Mike â€” No, not at all. Manley did not make a mistake, as any other authority was likely to have come to the same conclusion at the time
. Indeed Manley is remarkably free of errors, as are all books on British glass published over the last 25 years. The book with probably the longest errata list is Benson & Hayhurst, published 2003, and the reason was simply that Nigel and Jeanette were groundbreaking, covering important British cut glass from the 1930s onwards, deliberately not discussing aspects already well covered like Clyne Farquharson and Keith Murray, so there was no-one with any experience to proof read Nigel's text. Despite this immense difficulty the errata list is far shorter than you might reasonably expect.
Every reference book you read is out of date. They're out of date from the day they go to the printer. The onus is upon you, the reader, to appreciate that fact, and to keep it in mind, always. You should be constantly revising your library by adding in pencilled marginal notes as and when new research and other information affects the content. So, anyone reading this who is lucky enough to own a copy of Manley should be pencilling into the margin near that illustration a note along the lines of "March 2010 â€” Now attributed to Walsh mother of pearl, see GMB topic .....".
Keith â€” Photographs forthcoming.
Dave â€” Thanks for your posts. You probably made me make a much better case than had you not posted.