good job we're not both there fighting over the same pieces Roy - I tend to look only for f/pens now - what are the lozenge details on the plate - are they the same as the bowl? I've looked through most of the books on pressed glass, and as you know there are many pix of plates in opaque Vitro-Porcelain in a variety of colours, but I can't see a plate in QPIW - have I missed seeing one somewhere do you know??
Coming back to Sowerby colours, apparently Pomona was the Greek goddess of orchards and the apple was her favourite fruit. It was the Georgians who appear to have first used the word for a specific shade of apple green which was very fashionable during the Regency, used in clothing and domestic decor - a green colour which had the appearance of containing much yellow - so in essence a greenish yellow. By the sound of it this would be a good description of Sowerby's 'Aesthetic Green', and it sounds very possible that it was this special Sowerby colour that Sheilagh Murray was referring to when the lady used the word Pomona Green.
Ray Slack comments that "and an 'Aesthetic Green' was advertised extensively during the 1880s along with a very pleasant yellow called 'Giallo .." - so would appear that the use of these names for the green and yellow can be dated fairly accurately to that particular decade by the factory themselves, and were not later inventions. On the face of it simply unfortunate that Sheilagh Murray appears to have overlooked, or been unaware, that these terms were descriptions invented by the factory in the C19.