The shields of the fifteenth and sixteenth century were more for display than for use, except in the tilt-yard. As we have seen, the development of plate armour, especially on the left side, made the shield not only unnecessary, but also inconvenient. In the joust, however, where it was important that the lance should find no hold on a vital part of the body, such as the juncture of the arm, the shield was used to glance the weapon off, or, where unhorsing was the object, it was ribbed with diagonally crossing ridges to give the lance-point a surer hold. The Pavis or Pavoise (Fig. 37) was more generally used by archers and crossbowmen as a cover. A good specimen of the pavis exists in the Ashmolean Museum at Oxford, and there are two large examples of heavier make with peepholes for the archer, and wooden props as shown in our illustration, at Brussels and Berlin. [Illustration: PLATE X _Photograph by Viscount Dillon._ Horse armour of the Emperor Maximilian. Tower.] CHAPTER V HORSE ARMOUR The fully-equipped knight, whether in the cumbrous garments of mail or in the more adaptable suit of plate, was so entirely dependent on his horse, both in active warfare and in the tilt-yard, that some notice of the defences of the Destrier or war-horse is necessary in this short examination of the history of defensive armour. On the Bayeux Tapestry there is no suggestion of armour of any kind upon the horses, but Wace writes in the _Roman de Rou_ (line 12,627)-- Vint Williame li filz Osber Son cheval tot covert de fer. We should remember, however, that Wace wrote in the second half of the twelfth century and, like the other chroniclers of the Middle Ages, both in picture and text, portrayed his characters in the dress of his own time. The Trapper of mail shown on Fig. 38 is taken from Stothard's drawing of one of the paintings in the Painted Chamber at Westminster, now destroyed.[30] These decorations are supposed to have been executed about the year 1237. Here the horse is shown covered with a most inconvenient housing of mail, which can hardly have been in very general use, in this particular form at any rate; for it would be almost impossible for a horse to walk, let alone to trot or gallop, with such a defence. The textile trapper was, of course, lighter, and was used merely for ornament and display, though it may have been designed, as the surcoat was, to protect the mail defence beneath from wet. Jean Chartier, in his _Histoire de Charles VI_ (p. 257), states that sometimes these rich trappings or housings were, after the death of their owner, bequeathed to churches, where they were used for altar hangings, or inversely, when trappings were needed, the churches were despoiled of their embroideries to provide them. [Illustration: FIG. 38. Trapper of Mail, from the Painted Chamber, Westminster, thirteenth century.] [Illustration: FIG. 39. Ivory chessman, from Hewitt's _Ancient Armour_, fourteenth century.]