The Spur was still of a single goad, and fastened by a single strap. The form of the goad offers some variety: it is leaf-shaped, conical, lozenge-shaped, and sometimes consists of a ball from which springs a short spike. A variety is fashioned into a sort of button, having a slender spike in the centre. The first three kinds are seen in the Bayeux tapestry and many of the seals of the period. The ball-and-spike spur is well shewn in the effigies of Henry II. and Richard I. at Fontevraud, figured by Stothard in his "Monuments." The last variety may be seen in Addit. MS. 11,695, fol. 223. The shank of the spur is sometimes straight, as in Anglo-Saxon times: sometimes curved. The curved form appears in the sculptured effigies of King Henry II. and Richard I. The spur of Richard the First seems to have been attached to the strap by rivets. The Caltrop, or _tribulus_, an instrument derived from classic times, was in use, but not of frequent employment. Anna Comnena tells us that the Emperor Alexis strewed them in the path of the French cavalry; and at a later period, we read of knights fixing their spurs point upwards in the way of their advancing enemy, after the manner of caltrops: but this cruel device appears to have been practised very rarely, and we may venture to believe that it was generally discountenanced as beneath the dignity and generosity of true chivalry. At a later period, caltrops were used to strew over the slope of a breach, to impede the advance of a storming party. From a very curious passage in the _Roman de Rou_, we learn that the knight sometimes went to battle _tied to his saddle_:-- "Li reis aveit un soldéier, Brun out nom, novel chevalier. Sor son cheval sist noblement, Apareillié mult richement. A sa sele fu atachiez, E par li coisses fu liez," &c.--_Line_ 16,064. However strange such a device may appear, the mention of it by other ancient writers forbids us to regard it as a mere vagary of the poet. Matthew Paris, under the year 1243, recounting the irruption of the Tartars into Europe, says: "They have horses, not large, but very strong, and that require but little food, and they bind themselves firmly on their backs." And, in the fifteenth century, the writer of the life of Earl Richard of Warwick tells us that, at a justing-match, his hero was obliged to dismount from his horse, because some of his adversaries had accused him of being tied in his saddle. For the Horse itself, Spain appears to have been in the highest favour for the purity of its breed. Walter Giffard had brought from Gallicia the steed on which Duke William rode at the field of Hastings:--