On the Development and Distribution of Primitive Locks and Keys

by Augustus Henry Lane-Fox Pitt-Rivers

Fig. 10A. Longitudinal section.

Fig. 11A. Transverse section.

a. Bolt. b b. Teeth of key, c. d d. Tumblers. e e e. Block. f f. Holes in bolt.

Figs. 12A to 17A. Old Scottish wooden tumbler lock (Patent Museum).

Fig. 12A. Front view.

Fig. 13A. Side view.

Fig. 14A. Longitudinal section.

Fig. 15A. Transverse section.

Fig. 16A. Section through A B.

Fig. 17A. Section through C D.