If a man can bring to _London_ an ounce of Silver out of the Earth in _Peru_, in the same time that he can produce a bushel of Corn, then one is the natural price of the other; now if by reason of new and more easie Mines a man can get two ounces of Silver as easily as formerly he did one, then Corn will be as cheap at ten shillings the bushel, as it was before at five shillings _cæteris paribus_. 11. It behoves us therefore to have a way, whereby to tell the money of our Countrey (which I think I have, and that in a short time, and without cost, and (which is more) without looking into particular mens pockets; of which hereafter.) Now if we know what Gold and Silver we had in _England_ two hundred years ago, and could tell it again now; and though we also knew the difference of our denominations then, when thirty seven shillings were made out the same quantity of Silver as sixty two are now; also that of the alloy, labour in Coinage, remedies for weight and fineness, and duties to the King; nay, if we also knew the Labourers wages then and now, yet all this would not shew the difference of the Riches of our Nation even in money alone. 12. Wherefore we must adde to the premises, the knowledge of the difference of the numbers of the people, and conclude, that if all the money in the Nation were equally divided amongst all the people both then and now, that that time wherein each Devisee had wherewith to hire most labourers, was the richer. So that we want the knowledge of the People and Bullion which is now in this Land, and which was heretofore; all which I think may be found out even for the time past, but more probably for the time present and to come. 13. But to proceed; suppose we had them, then we would pitch the accidental values upon our Lands about _London_; as thus, _viz._ We would first at hazzard compute the materials for food and covering, which the Shires of _Essex_, _Kent_, _Surrey_, _Middlesex_ and _Hertford_, next circumjacent to _London_, did _communibus annis_ produce; and would withal compute the Consumptioners of them living in the said five Shires and _London_. The which if I found to be more then were the Consumptioners living upon the like scope of other Land, or rather upon as much other Land as bore the like quantity of Provisions. Then I say, that Provisions must be dearer in the said five Shires then in the other; and within the said Shires cheaper or dearer as the way to _London_ was more or less long, or rather more or less chargeable.