Perhaps the most ingenious contrivance used in making the suit of armour is the sliding rivet (Fig. 30). This contrivance has come to be called the “Almain rivet” in modern catalogues in a sense never found in contemporary documents. In these documents the “Almain rivet” is a light half-suit of German origin, made up of breast, back, and tassets, with sometimes arm-pieces. The word “rivet” was employed in the sixteenth century for a suit of armour, for Hall uses the word frequently in his Chronicles. This word is therefore more probably derived from the same root as the French _revêtir_, rather than from the rivets which were used in the making of the suit. Up to the sixteenth century the rivet as we know it to-day is always called an “arming-nail,” and it is only in the middle of the sixteenth century that we find the word rivet used as part of the armourer’s stock-in-trade. These light suits were put together with sliding rivets, which have at the present day received the name originally given to the whole suit. The head of the rivet is burred over and fixed in the upper plate, but the lower plate is slotted for about three-quarters of an inch, so that it will play up and down on the shank of the rivet and give more freedom of action than the fixed rivet; at the same time it will not allow the two plates to slide so far apart as will uncover the limb or body of the wearer. These sliding rivets were used to join the upper and lower portions of the breastplate which was in fashion in the last years of the fifteenth century, so as to allow a certain amount of movement for the torse backwards and forwards. They were also employed to join the taces, which needed a certain amount of play when mounting a horse or when sitting. When the “lobster-tail” cuisse superseded the taces and tassets in the late sixteenth and seventeenth centuries they were used instead of the fixed rivets for joining the lames of the cuisse. [Illustration: _PLATE XIII_ ARMET OF SIR HENRY LEE, BY JACOB TOPF, 1530-1597] The most ingenious arrangement of sliding rivets, however, is to be found on the brassards of the late fifteenth to the seventeenth century. As has been noticed on page 6, the armourer had to consider in this case both the defensive needs of his patron and also the necessity for using his arm as conveniently as was consistent with safety. Now the only actions needed for the right arm are those of holding the lance in rest and of striking with the sword. The arm-defence therefore had to be so constructed that the arm could be bent for the former and raised for the latter. To do this the lames of the rerebrace are joined with sliding rivets at the hinder corners, but at the front corners they are joined with a strap fastened vertically to the top plate of the brassart and riveted, when extended straight, to each lame.