It was a ledger with a half-leather binding such as storekeepers use for accounts.
For the stronger end papers and in half-leather bindings a cloth joint is used.
For leather or half-leather bindings a strip of wrapping paper or thin cardboard is cut.
Books bound in half-cloth or half-leather have the sides covered with paper; the latter often with cloth.
Cloth must be used for sides of all books bound in half-leather or half-duck.