C C Strings or tapes on which the book is sewn.
D D End sheets of lithograph paper. The part at the left is pasted to the inside of the board and becomes the lining paper. B and C being pasted over on to D, when D is pasted to A they are carried with it and lie under the end sheet or lining paper.
E E Jaconet or thin muslin guard pasted on D before the book is sewn.
F F Waste papers of good book paper.
G G Jaconet guard of waste papers. Before the book is trimmed F and D are pasted together and become a doubled fly leaf.
H H The first signature of the book.
J J Jaconet guard of the first signature.
K K K Paths of threads.
L Leather back.
M Cloth or paper side.