In my view
€18 · Offered by MW Books
1950, First Edition. London : Longmans, Green & Co. Very good cloth copy in a good if somewhat edge-torn (with some loss) and dust-dulled dust-wrapper, now mylar-sleeved. Remains quite well-preserved overall. Physical description: xii, 257 pages ; 19cm. Subjects: Art -- Great Britain. Art criticism.
Found via Rare Books Intel, a search across rare-book dealers, auction houses and marketplaces worldwide.