Frank Brangwyn, 1919 Bookplate Wood Engraving on Vellum for Estella Canziani.
This is a bookplate by Sir Frank Brangwyn RA (1867 – 1956) for the artist, writer and folklorist Estella Canziani. One of 15 proofs on Japanese vellum, it measures 4 inches high by 3.5 inches wide. More details on this and other Brangwyn bookplates are here
http://www.frankbrangwyn.org/bookplates.html
Provenance - from Rachel Moss Exhibition eight or nine years ago..
Bought from the Millinery Works in Islington, London, N1 eight or nine years ago. The relevant web page is still up:
http://www.millineryworks.co.uk/pages/Argal_ByDesign_RachelMoss3.htm - you can see the listing towards the bottom, item 78 (it's actually one of 15 on vellum).
I spoke to them and they say that the sale was via Rachel Moss the artist, who is now dead, so sorry, but they have no further information - she just used their gallery space and the item was bought from her.