On the Development and Distribution of Primitive Locks and Keys

by Augustus Henry Lane-Fox Pitt-Rivers

Fig. 116. Key.

Figs. 117 to 121. Modern wooden Chinese tumbler lock, the tumblers raised by a T-shaped key; the bolt shot with a revolving key, or handle, a.

Fig. 117. Front view.

Fig. 118. Transverse section, A B.

Fig. 119. Longitudinal section.

Fig. 120. Top view of bolt.

Fig. 121. Top view of key.

Fig. 122. Roman iron key, found in London.

Fig. 123. Key from Chalons ('La Ferronnerie').

Fig. 124. Key from Museum at Saumur ('La Ferronnerie').