“Merke ye wele theys questionys here, now folowying!” --BOKE OF ST. ALBANS, A.D. 1486. Amongst his comrades in arms, or in the midst of a hostile array, the last object that a mediæval Knight would expect or desire to observe, on the morning of a battle or a joust, would be an exact counterpart of himself. Occasions, indeed, might sometimes arise, when it might be highly desirable that five or six counterfeit “Richmonds” should accompany one real one to “the field”; or, when a “wild boar of Ardennes” might prefer to encounter the hunters, having about him the choice of his own “boar’s brood,” garnished at all points exactly after his own fashion. These, however, are rare and strictly exceptional cases. And the Knight, to whom distinction was as the breath of his nostrils, as he closed his vizor trusted confidently to his heraldic insignia to distinguish him, while, in the fore-front of the fray, with sword and lance and axe he would strive manfully to distinguish himself. This implies that Heraldry, besides assigning to different families their own distinct insignia, should possess the faculty of distinguishing the several members, and also the various branches of the same family, the one from the other. A faculty such as this Heraldry does possess, in its marks of CADENCY. In “_marking Cadency_”--that is, in distinguishing the armorial insignia of kinsmen, who are members of the very same family, or of some one of its various branches, it is a necessary condition of every system of “Differencing” that, while in itself clear and definite and significant, it should be secondary to the leading characteristics of the original Coat of Arms which denotes the senior branch of the Family, and also declares from what fountain-head all the kinsmen of all the branches have derived their common descent.