although a collector of mostly clear glass, I can appreciate and see the attraction of Monart pieces even though I know very little about them and don't have a single piece.
I mention this as I've just received Part 1 of the Christie's catalogue from 1997 covering the sale of the initial group of the Parkington collection, which included his Monart section of something like nearly 70 pieces, plus I think a couple of Vasart vases. The colours are stunning and beautiful.
As mentioned by Frank elsewhere, Michael Parkington's wife Peggy did donate the 500 pieces from the Broadfieled House exhibition to the museum, but since his Scottish material was in the auction catalogue, then obviously those all went back into private hands.
I've ordered the catalogue for Part 2 of the sale of his glass, so waiting to see exactly what this covers.
If you can get your hands on these catalogues they really are a treat, and cover many areas of British glass from the C18 to virtually the end of the C20.