Cathy — don't worry about errata lists, as long as you substantiate your information, quote sources in full, and are prepared to update them as new information emerges. They are excellent publicity for the reference work and will improve sales (the ONLY thing of any interest to the publisher), and all authors will welcome them, even if sometimes a little reluctantly at the start. If you receive any complaints, just point out that all reference works are out of date as soon as the final proofs are sent to the printers. And emphasize that the errata list for the first Bielby book turned into a second volume more useful and profitable than the first.
I take "S&W" and "Webb" attributions from all but serious heavyweights in the USA with a bucketful of salt. Over here it is usually "Powell", or "Stuart" for anything with a green streak in it!
My own experience with genuine examples of Walsh and S&W is that they made all their glass to the exact size specified. When buying unmarked Walsh cut in traditional patterns I look for the quality of the blank, cut and finish, the weight, and the exact inch size, before looking it up in the pattern books in Reynolds, where it has to be a perfect match.
Everyone — thanks for the material so far, although it does not look too promising. As the robot #5 said in
Short Circuit "Input — Need more input".
Leni — grateful thanks for your pictures and measurements. I have come to the conclusion that my initial observation was partly a coincidence, and partly due to my custom of measuring glass before buying, and having an inbuilt preference for inch sizes.
Bernard C.
