The limbs began to be definitely protected over the mail in the second half of the thirteenth century. Effigies and manuscript illustrations of that date commonly represent globose knee-caps, sometimes ridged down the front, and usually gilt. In the fourteenth century they are always present and frequently treated very decoratively, with shields, roundels, scalloped edges, etc. The technical name for these appendages is "Genouillière," or "knee-cap." Subsidiary plates often appear below the knee, and sometimes above it, and are continued under the mail. The greave was a rigid gaiter fitting at first only over the front of the leg below the knee, but afterwards enveloping it; and it was either of metal or cuir-bouilli. When seen on English fourteenth-century monuments it usually seems to be of steel fitting closely over the mail, and laced or buckled at the back, but at times it is so richly decorated as to suggest cuir-bouilli. Greaves are usually omitted on early monuments, and are only commonly seen when they had become an integral part of the suit of armour. As yet they were not habitually worn except in battle, and knights were not at this time represented in their effigies accoutred for war, but in ordinary military costume. Thus the effigy of Aymer de Valence shows no plate armour, except the genouillière; but the two mounted figures of the canopy present the visored bassinet, the high gorget, the arm and elbow plates, the tubular greaves and steel sollerets for the feet. The tubular leg defence is not seen in earlier representations, and its introduction may coincide with the first recorded appearance in the field of large bodies of Welsh armed with long knives. It was usually hinged and buckled, and becomes more general as the century advances. This appears in the inventory of Piers Gaveston, 1313, who possessed three pairs of such greaves. Monstrelet relates that the bailiff of Evreux, sallying out without his greaves, had his leg badly broken by the kick of a horse.