Figs. 113 to 116. Modern wooden tumbler lock, adapted to a revolving key, from India (India Museum).

Fig. 113. Front view. A, bolt.

Fig. 114. Longitudinal section.

Fig. 115. Transverse section.

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').

Fig. 125. Key from Museum at Saint Germain ('La Ferronnerie').

Fig. 126. Modern English latchkey.

Fig. 127. Lock with complex wards, used in the Middle Ages.

Figs. 128 to 130. Modern tumbler lock found at Funtley, Hants, belonging to Mr. Chubb.

Fig. 128. Longitudinal section.

Fig. 129. End view and section.

Fig. 130. Top view of bolt.

Fig. 131. Barron's tumbler lock (Tomlinson 'On Locks and Keys').