thanks Fred - If you wanted to point to a reliable author I think Mr. Gulliver might take first prize - he does appear to have done much research and his book seems to be very accurate - I remember Bernard eulogizing frequently.
Eric Reynolds also appears to have done his research for the id of Rd. 99882, since it appears he didn't have the domed cover (which is shown in TNA drawing on the same page) when producing the photo for his book, although as he says his piece does carry a diamond lozenge ............... and possibly unique the way he captions his picture with the lozenge data of 18 H E.......... which would probably confuse anyone not familiar with such details. For those people who don't have Reynolds book, I will show TNA drawing of Rd. 99882, probably in the next batch of ink wells.
However, unfortunate that Reynolds appears to have been unaware of the other early Walsh Rd. 90767 from 12th April 1853, since Ray Slack's book - which does include Rd. 90767 in the numerical list - was published some twelve years before the publication of Eric Reynolds book - but I agree that this earlier Rd. from Walsh doesn't seem to be in Reynolds book.
It's possible that since most of these items were 'utility pieces' and probably had a hard life, then most have long since gone to the rubbish tip.
Keith - thanks for showing your ink wells - these 'bottle green' sort of cheap pieces were probably produced in profusion - very few of them I'd imagine were ever protected with a Board of Trade Registration and I've seen many such pieces at boot sales over the years. Stoppers were almost certainly just a piece of cork, and I'd suggest that the first two with sharp and irregular top rims are possibly the oldest. Will need to look on that 'bottle' site that we occasionally link on the Board, to see if we can provide an idea of date, but at the moment regret unable to suggest what the upper case letters might indicate.
P.S. sorry, can't seem to add the web link, but name is ... Historic Glass Bottle Identification & Information Website - there is a section on ink wells. [Mod: See separate reply below for url of the website and the section on inkwells.]