The German practice of using horns on either side of the crest, which the ignorance of English heralds has transformed into the proboscides of elephants, is dealt with at some length on page 214. The horns, which are termed buffalo's or bull's horns until the middle of the thirteenth century, were short and thick-set. It is difficult to {344} say at what date these figures came to be considered as heraldic _crests_, for as mere helmet ornaments they probably can be traced back very far beyond any proof of the existence of armory. In the fourteenth century we find the horns curved inwards like a sickle, but later the horns are found more erect, the points turning outwards, slimmer in shape, and finally they exhibit a decidedly marked double curve. Then the ends of the horns are met with open, like a trumpet, the fact which gave rise to the erroneous idea that they represented elephants' trunks. The horns became ornamented with feathers, banners, branches of leaves, balls, &c., and the orifices garnished with similar adornments. In England, crests are theoretically subject to marks of cadency and difference. This is not the case, however, in any other country. In Germany, in cases where the crests reproduce the arms, any mark of cadency with which the arms are distinguished will of course be repeated; but in German heraldry, doubtless owing to the territorial nature of the crest, a change in the crest itself is often the only mark of distinction between different branches of the same family, and in Siebmacher's _Wappenbuch_ thirty-one different branches of the Zorn family have different crests, which are the sole marks of difference in the achievements.