sorry, I think you may have to become accustomed to living with misery. Cyril Manley illustrates some examples, containing both clear and uranium, and obviously was confident enough to attribute all of them to Webb - although none of his are completely clear (they all exhibit some uranium) - although, regrettably, he doesn't explain why he attributes them to Webb. Gulliver illustrates a variety of colours/types, but as is often the case with this author, he plays safe and avoids making any attribution. I believe the vernacular name for these pieces is 'thorn vases' - and understand that Stevens & Williams also made very similar objects. Sorry that this is really unhelpful, but just one of those rather common articles, which were very popular with the Victorians.