It is practically impossible to notice the various forms of turning or locking pins used for joining parts of a suit. The general principle is that of a turning rivet with a flat, fan, or hook shaped head which, fitting into an oblong slot in the upper plate, can be turned at right angles to hold the two plates together. There are many varieties of this fastening, based upon the same principle, but those existing at the present day are often modern restorations. In suits for the joust or tourney these adjustable fastenings could not always be depended upon, and the great helm, the manteau d’armes, and the passgarde were often screwed on to the suit with square or polygonal headed bolts tightened with a spanner. The gauntlet was sometimes capable of being locked, for the unfingered flap which covered the fingers was prolonged so as to reach the wrist, where it fastened over a pin. This was used in foot jousts to prevent the weapon from being struck out of the hand and is sometimes called the “forbidden gauntlet,” an absurd term when we consider that many fine suits are provided with this appliance, which would not be the case if its use were not allowed (Fig. 32, also Plate XXII). [Illustration: FIG. 33. Locking hooks, turning pins, and strap-cover.] A few of the fastenings used to hold the different parts of the suit together are shown on Fig. 33. The hook (No. 1) is found on the armets made by Topf (page 21 and Plate XIII). Here the hook A is shown in position fastening the visor over a button D. When it is necessary to open the visor a leather thong which was attached at C is pulled and at the same time the button F is pressed. This depresses a spring riveted to the visor at G and projecting with a small tongue at E. The depression of E allows the hook to be moved back and the visor to be raised. When the hook is moved forward to close the visor the tongue E springs up and locks the whole firmly. No. 2 of the same figure is another contrivance for locking plates together, and is found on 695, Wallace Collection, and elsewhere. C C C is the section of the armour plate. The hook is pivoted at C and is fitted with a spring at D. When the leather lace at A is pulled the tongue of the hook B is brought back flush with the plate C and allows the visor to be raised. When the visor is closed the hook springs back to its position and locks the plates together. No. 3 is a catch of the same kind, but is worked by a spring of the same kind as that which locks the “Topf” hook. The pressing of the button A sets back the hook B, which is riveted to the plate at D. No. 4 is a “spring pin,” or “federzapfen” as they are called in German and “auberon” in French. The small flange let into the pin is kept pressed outwards by a spring and is pressed back to slip the pauldron, in which is a hole cut for the purpose, over the pin. No. 5 shows a series of turning pins which are riveted to the lower plate in taces, cuisses, tassets, etc., but