We may now turn to the making up of these varied materials, and will endeavour, step by step, to trace the gradual evolution of the full suit of plate from the first additions of plate defence to mail till we find that the mail practically disappears, or is only worn in small portions where plate cannot be used. [Illustration: FIG. 11. From Roy. MS. 16. G. vi, f. 387, fourteenth century.] [Illustration: FIG. 12. Bib. Nat., Paris, _Lancelot du Lac_, fourteenth century.] Setting aside the plastron de fer, which, as has been noticed, is seldom shown in representations of armour, we find the first additional defence was the Poleyne or knee-cop. We must suppose that there was good reason for thus reinforcing the mail defence on this part of the body. Probably this was due to the fact that the shield became shorter at this period, and also because the position of the wearer when mounted exposed the knee, a very delicate piece of anatomy, to the attacks of the foot-soldier (Fig. 11). Poleynes are mentioned in a wardrobe account of Edward I in 1300. They were frequently made of cuirbouilli, and this material is probably intended in the illustration (Plate III, 1), as elaborately decorated metal is rarely met with at this period. At the end of the thirteenth century appear those curious appendages known as Ailettes. On Plate III, 2, the figure is shown wearing the poleynes and also the ailettes. For practical purposes they are represented on recumbent figures as worn at the back, but in pictorial illustrations they are invariably shown on the outside of the shoulder. Some writers consider that they were solely used for ornament, presumably because they are generally shown decorated with heraldic blazons. Against this, however, we may place the fact that they are depicted in representations of battles, and in Queen Mary's psalter (2. B. vii in the British Museum) the combatants wear plain ailettes. The German name for the ailettes (_Tartschen_) suggests also that they were intended for shoulder-guards. Fourteenth-century Inventories abound with references to ailettes. In the Roll of Purchases for Windsor Park Tournament are mentioned thirty-eight pair of ailettes to be fastened with silk laces supplied by one Richard Paternoster. In the Piers Gaveston Inventory before quoted are: 'Les alettes garnis et frettez de perles.' These, of course, would be only for ceremonial use. The illustration (Fig. 11) shows different forms of ailette, and occasionally we find the lozenge-shaped, and once (Brit. Mus. Roy. MS. 2. A. xxii, fol. 219) they assume a cruciform shape. The attachment of the ailettes with the laces referred to in the Windsor Park Inventory is shown on Fig. 12. In the _Chroniques de Charlemaine_, preserved in the Bibliothèque Royale at Brussels, the ailettes appear to be laced to the side of the helmet. This occurs in so many of the miniatures that it must be taken as a correct presentment of this detail in arming.