the east, a necessity would be specially felt among traders for a somewhat heavier unit than the original shekel. Possibly then the Aramaean merchants adopted the double shekel (based on the double ox-unit) for the purpose of weighing silver (when that metal had now become much more plentiful than gold), and for trade in precious gums and spices. Such a procedure can be well paralleled by the old English pound of silk, which is simply two pounds Troy weight. Silk was of course of great value, and was accordingly weighed after the same system as the precious metals; but when it became less costly and more abundant the weight unit was simply doubled. We may therefore regard the doubling of the original shekel as an early step towards the development of a commercial standard. It is not difficult to understand how in the course of time a nation of traders like the Phoenicians preferred this double standard even for their gold, and made it perhaps, as we shall shortly see, the basis of their silver standard.
We saw above that there is every reason to believe that when silver first became known to mankind, they esteemed it as highly as gold, if not more so. It would naturally, therefore, be weighed on the same standard as gold. This would continue until, in the course of years, a time came when the relation between gold and silver had become fairly fixed over all