15. And forasmuch as possibly there may be more Art and Hazzard in working about the Silver, then about the Corn, yet all comes to the same pass; for let a hundred men work ten years upon Corn, and the same number of men, the same time, upon Silver; I say, that the neat proceed of the Silver is the price of the whole neat proceed of the Corn, and like parts of the one, the price of like parts of the other. Although not so many of those who wrought in Silver, learned the Art of refining and coining, or out-lived the dangers and diseases of working in the Mines. And this also is the way of pitching the true proportion, between the values of Gold and Silver, which many times is set but by popular errour, sometimes more, sometimes less, diffused in the world; which errour (by the way) is the cause of our having been pestred with too much Gold heretofore, and wanting it now. 16. This, I say, to be the foundation of equallizing and ballancing of values; yet in the superstructures and practices hereupon, I confess there is much variety, and intricacy; of which hereafter. 17. The world measures things by Gold and Silver, but principally the latter; for there may not be two measures, and consequently the better of many must be the onely of all; that is, by fine silver of a certain weight; but now if it be hard to measure the weight and fineness of silver, as by the different reports of the ablest Saymasters I have known it to be; and if silver granted to be of the same fineness and weight, rise and fall in its price, and be more worth at one place then another, not onely for being farther from the Mines, but for other accidents, and may be more worth at present, then a moneth or other small time hence; and if it differ in its proportion unto the several things valued by it, in several ages upon the increase and diminution thereof, we shall endeavour to examine some other natural Standards and Measures, without derogating from the excellent use of these. 18. Our Silver and Gold we call by severall names, as in _England_ by pounds, shillings, and pence, all which may be called and understood by either of the three. But that which I would say upon this matter is, that all things ought to be valued by two natural Denominations, which is Land and Labour; that is, we ought to say, a Ship or garment is worth such a measure of Land, with such another measure of Labour; forasmuch as both Ships and Garments were the creatures of Lands and mens Labours thereupon: This being true, we should be glad to finde out a natural Par between Land and Labour, so as we might express the value by either of them alone as well or better then by both, and reduce one into the other as easily and certainly as we reduce pence into pounds. Wherefore we would be glad to finde the natural values of the Fee simple of Land, though but no better then we have done that of the _usus fructus_ abovementioned, which we attempt as followeth.