The difficulty of obtaining and working metal, however, was such that it was only used by the wealthy, and that sparingly. The more common fashion of arming was a quilted fabric of either linen or cloth, a very serviceable protection, which was worn up to the end of the fifteenth century. Another favourite material for defensive purposes was leather. We read of the shield of Ajax being composed of seven tough ox-hides, and the word 'cuirass' itself suggests a leather garment. Now, given either the leather or the quilted fabric, it is but natural, with the discovery and use of iron, that it should have been added in one form or another to reinforce the less rigid material. And it is this reinforcing by plates of metal, side by side with the use of the interlaced chain armour, which step by step brings us to the magnificent creations of the armourer's craft which distinguish the fifteenth and sixteenth centuries. Sir Samuel Meyrick[3] leads us into endless intricacies with his theories of the various kinds of defensive armour in use at the time of the Conquest; but these theories must of necessity be based only upon personal opinion, and can in no way be borne out by concrete examples. If we take the pictured representations of armour as our guide we find certain arrangements of lines which lead us to suppose that they indicate some peculiar arrangement of metal upon a fabric. The first and oldest of these varieties is generally called 'Scale' or Imbricate armour. We find this represented on the Trajan Column, to give only one of the many examples of its use in very early times. That it was a very pliant and serviceable defence we may judge from the fact that, with some alteration in its application, it formed the distinguishing feature of the Brigandine of the fifteenth century. The scales were sewn upon a leather or quilted garment, the upper row overlapping the lower in such a manner that the attachment is covered and protected from injury (Plate I, 1). The scales were either formed with the lower edge rounded, like the scales of a fish, or were feather-shaped or square. Another method of reinforcing the leather defence has been named the 'Trellice' coat. It is always difficult to discover exactly what the primitive draughtsman intended to represent in the way of fabrics, and it is quite open to question whether these diagonal lines may not merely suggest a quilting of linen or cloth. If it is intended to represent leather the trellice lines would probably be formed of thongs applied on to the groundwork with metal studs riveted in the intervening spaces (Plate I). This arrangement of lines is very common on the Bayeux Tapestry. [Illustration: PLATE I