Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

     Now for the rest: copper and gold and iron
Discovered were, and with them silver's weight
And power of lead, when with prodigious heat
The conflagrations burned the forest trees
Among the mighty mountains, by a bolt
Of lightning from the sky, or else because
Men, warring in the woodlands, on their foes
Had hurled fire to frighten and dismay,
Or yet because, by goodness of the soil
Invited, men desired to clear rich fields
And turn the countryside to pasture-lands,
Or slay the wild and thrive upon the spoils.
(For hunting by pit-fall and by fire arose
Before the art of hedging the covert round
With net or stirring it with dogs of chase.)
Howso the fact, and from what cause soever
The flamy heat with awful crack and roar
Had there devoured to their deepest roots
The forest trees and baked the earth with fire,
Then from the boiling veins began to ooze
O rivulets of silver and of gold,
Of lead and copper too, collecting soon
Into the hollow places of the ground.
And when men saw the cooled lumps anon
To shine with splendour-sheen upon the ground,
Much taken with that lustrous smooth delight,
They 'gan to pry them out, and saw how each
Had got a shape like to its earthy mould.
Then would it enter their heads how these same lumps,
If melted by heat, could into any form
Or figure of things be run, and how, again,
If hammered out, they could be nicely drawn
To sharpest points or finest edge, and thus
Yield to the forgers tools and give them power
To chop the forest down, to hew the logs,
To shave the beams and planks, besides to bore
And punch and drill. And men began such work
At first as much with tools of silver and gold
As with the impetuous strength of the stout copper;
But vainly- since their over-mastered power
Would soon give way, unable to endure,
Like copper, such hard labour. In those days
Copper it was that was the thing of price;
And gold lay useless, blunted with dull edge.
Now lies the copper low, and gold hath come
Unto the loftiest honours. Thus it is
That rolling ages change the times of things:
What erst was of a price, becomes at last
A discard of no honour; whilst another
Succeeds to glory, issuing from contempt,
And day by day is sought for more and more,
And, when 'tis found, doth flower in men's praise,
Objects of wondrous honour.