Help identifying these fabrics

I have two pieces of this in different colourways. Kind of art nouveau style. Probably a linen blend.

These look like Sanderson prints to me, chintzes, vintage, possibly dating from the fashion for William Morris in 1970s/1980s. Unless of course they are original to the WM period! If you have not already done so I suggest approaching Sanderson's and asking them- they have an archive. Another source of enquiry would be the Victoria and Albert Museum, they will respond to a request for advice of this kind, it is part of their role as a national collection.