Odd volume with pages hollwoed out and marbled paper sides inserted, the pages then stuch together to creat a hidden compartment within the book. The book measures 6.8 x 4 inches, the compartment inside 5.3 x 3 inches and about 1 inch deep. The binding is original 18th century full tan calf with twin labels and full gilt tooling and letering to te spine. Boards with elaborate gilt borders and coat of arms in the centre. Front hinge split but firm. An attractive volume and a great way to keep treasures safe.:.