Further, in a supplement to the laws of the Wisigoths[132] is a statement under the name of _Wamba Rex_ (A.D. 672-680), which apparently represents the monetary system in vogue south of the Frankish boundary. It states that the pound of gold equalled 72 gold solidi, so that the gold solidus was not the Merovingian solidus but that of Constantine. It then states that the ‘dragma’ of gold = ‘XII argentei.’ The argenteus being the silver drachma, the ratio of gold to silver was 1:12. To Isidore of Seville, from his Spanish standpoint, the silver drachma was still the denarius.[133] Dragma octava pars unciæ est et _denarii_ pondus argenti, tribus constans scripulis. The drachma is the eighth part of an ounce, and the weight of the silver denarius containing three scripula. _Solidus_ apud Latinos alio nomine ‘sextula’ dicitur, quod his sex uncia compleatur; hunc, ut diximus, vulgus _aureum_ solidum vocat, cujus tertium partem ideo dixerunt tremissem.[133] The _solidus_ with the Romans is otherwise called the _sextula_ because it is one sixth of the ounce; hence, as we have said, the vulgar call the _solidus_ the _aureus_, the third part of which is called the tremissis. Thus the solidus was the typical gold unit or aureus, and the drachma was the silver denarius or argenteus. [Sidenote: Twelve drachmas of silver = at 1:10 the Merovingian gold solidus.] It is remarkable that at a ratio of 1:10 twelve Wisigothic or Roman argentei or drachmas of silver equalled exactly in wheat-grains the Merovingian gold solidus current on the Frankish side of the Garonne or the Loire.[134] It would seem, then, probable that traditionally and ‘according to ancient custom’ outside the Frankish kingdom the Merovingian gold solidus had been equated with twelve silver argentei or denarii of this reckoning, whilst within Frankish limits 40 of the silver tremisses and now of the pence of the nova moneta were reckoned as equal to the gold solidus of the Lex Salica. But even to the Frank the 40 denarii of the Lex Salica may have become antiquated except for wergelds and other payments under its provisions. [Sidenote: The silver solidus of 12 silver tremisses already in use in accounts, as 1/20 of the pound of silver of 240 pence.] The practice apparently had already grown up of reckoning 12 of the silver tremisses as a solidus of silver, twenty of which went to the pound of 240 pence, without, however, any pretence being made that this solidus of twelve silver pence was to be reckoned as equal to the gold solidus in making payments. In the ‘Capitulare Liftinense’ of A.D. 743[135] a payment is enacted _de unaquaque cassata solidus, id est 12 denarii_. It was necessary to make this explanation. It is not known how much earlier the practice of reckoning in pounds of silver of 20 solidi of 12 denarii came into vogue, but it was long before the issue of the nova moneta.