On the Development and Distribution of Primitive Locks and Keys

by Augustus Henry Lane-Fox Pitt-Rivers

Fig. 31A. Transverse section.

Fig. 9B. Probable use of fig. 29B, Plate III., as a key for a single tumbler lock.

Figs. 10B to 12B. Modern Egyptian wooden tumbler or pin-lock in use at the present time.

Fig. 10B. Longitudinal section showing pegs raised by key A preparatory to withdrawing the bolt B.

Fig. 11B. Key A.

Fig. 12B. Longitudinal section showing pegs down and bolt locked.

Wyman & Sons, Printers, G^t. Queen S^t. London, W.C.

PLATE III.

Figs. 13B and 14B. Modern wooden tumbler or pin-lock from Yarkand (India Museum).