Fig. 21B. Ancient hasp from Hetternheim, Roman.

Fig. 22B. Bronze bolt from Oppenheim, Roman.

Fig. 23B. Bronze bolt from Heddernheim, Roman.

Fig. 24B. Iron key found in the River Rhine at Mayence, Roman.

Fig. 25B. Key for tumbler lock with ward plate, Roman ('La Ferronnerie').

Fig. 26B. Bolt for single tumbler found in the Forest of Compiègne, Roman ('La Ferronnerie').

Fig. 27B. Key to raise single tumbler lock found at Nonfous, Switzerland, Roman ('La Ferronnerie').

Fig. 28B. Modern pick-lock.

Fig. 29B. Key found in Germano-Roman tomb at Niderolm (probable use shown in fig. 9B, Plate II.).

Fig. 30B and Fig. 31B. Anglo-Saxon keys found at Sarr, in Kent ('Archæologia Cantiana').