How does one describe this - I have a little book dated 1898, Through the Looking Glass, and while on the shabby side it is still quite delightful with 50 illustrations by John Tenniel. The pages are all tight and square but there is 'lift or separation' between pages 64-65 and 144-145.
When the book opens out flat I can see a line of backing or webbing? So, how to describe?