A thing of beauty is a joy for ever:
Its loveliness increases; it will never
Pass into nothingness; but still will keep
A bower quiet for us, and a sleep
Full of sweet dreams, and health, and quiet breathing.
John Keats, Endymion 1818
Doublure in Levant Morocco, with inlay and tooling. By Robert Riviere and Son, Sometime after 1880.
A doublure is a bookbinding term, from the French doublure, that describes an ornamental or decorative lining on the inside of a book. This one is made with an unidentified “quality leather,” probably goat skin, that is particularly soft or pliable and ideal for bookbinding work.
Update: Image is from Holme, Charles. 1914. The art of the book. London: “The Studio” Ltd. p.95. Our Cooper-Hewitt National Design Museum Library has a 1920 book on an exhibit by Riviere & Son at the Leipzig Exhibition in 1914, also full of wonderfully elaborate bookbindings.