I'm so grateful to everyone for the support and kind comments. Thank you so much (it means such a lot to me).
I need to answer the glass questions here:
Anne - I would be fairly sure that the jardiniere was made in other types of glass too.
Cathy - the $24,000 question certainly centres on who made Diana and the Cupids. It is very possible that it was Zabkowice. But Hortnesja are still in the frame (my money is on Zabkowice though). And it could even be another Polish maker that we haven't yet uncovered. Tony has some other intaglio based pieces too (see the Hortnesja thread) that I am not able to positively atribute yet, too. I am sure there is a lot more to discover about the Polish output - and I think by this time next year we will be a lot further forward.
Tony - if you could email me (get the addy off my HomePage) I will pass on your contact details to John Hodgson. Also, you mentioned the Laroc pieces. Yes, I looked at them and was enthralled. I don't have any useful comments to add, though, beyond "it rings a faint bell".