Whether this originated in a lock of the last-mentioned form--and the screw, from having at first been used as a ward, was ultimately employed to release the bolt by a screw motion--I know not; but it exactly resembles in its construction the lock shown in fig. 35C, Plate V., from the gate at Rushmore, Wilts, and those of like form from France and Germany already figured and described. The bolt is retained in its place when locked by a spiral spring, and withdrawn by a screw key inserted at the end. Whether this is an independent growth in the two hemispheres, or copied the one from the other, I have no present means of determining. Unfortunately, when the objects in the India Museum at South Kensington were transferred from the old India Museum their history was lost; but I have figured none except those which have the localities attached to them. Figs. 82C, 83C, and 84C, Plate VIII., is a steel lock from India of similar external form to fig. 71C, Plate VII.; but the screw principle appears here to have entirely superseded the spring, which is altogether wanting, and it is dependent for its action entirely on a screw key inserted at the end, and by means of which the bolt (which itself formed the staple) is screwed up or screwed back again as required. As a parallel to this, the specimen in my collection represented in figs. 85C, 86C, 87C, 88C, and 89C, Plate VIII., may be given. It was obtained by me in Brussels, and resembles the tubular lock only in external form. The staple is secured to the tube at each end by eyes let into the side of the tube, through which a pin is passed, and screwed up or unscrewed by a key put in at the end of the tube. When unscrewed the pin is withdrawn and the staple taken out bodily. In this, as in the Indian specimen last described, the original spring mechanism has entirely disappeared; but, although resembling each other in this respect, there is nothing analogous in the two systems, which, from differences in the details of their construction, appear to be quite independent contrivances. Figs. 90C, 91C, and 92C, Plate VIII., represent a padlock and key from Toomkoor, Mysore, India. It is a barbed spring padlock of the ordinary kind, but the springs are closed preparatory to being withdrawn by means of a common revolving key inserted in the side and having a broad slit in the middle of the revolving plate. By giving the key a quarter-turn the slit in the key-plate compresses the springs, and they are then withdrawn from the lock. The action of the key in this specimen resembles exactly that of the padlock from Paris (fig. 39C, Plate VI.) and that of the Royal Society chest, except that in the Paris and Royal Society specimens two springs are compressed by means of a solid plate, whilst in the Toomkoor example a single-barbed spring is compressed by the action of a slit in the key. Barbed tubular spring locks of precisely the same form as the Chinese ones are also used in Japan, of which figs.