the origins of (metal)

http://youtu.be/AX2y51ixsu8 - Rondellus, "Verres Militares" (3'27")

Now, Memmius,
How nature of iron discovered was, thou mayst
Of thine own self divine. Man's ancient arms
Were hands, and nails and teeth, stones too and boughs-
Breakage of forest trees- and flame and fire,
As soon as known. Thereafter force of iron
And copper discovered was; and copper's use
Was known ere iron's, since more tractable
Its nature is and its abundance more.
With copper men to work the soil began,
With copper to rouse the hurly waves of war,
To straw the monstrous wounds, and seize away
Another's flocks and fields. For unto them,
Thus armed, all things naked of defence
Readily yielded. Then by slow degrees
The sword of iron succeeded, and the shape
Of brazen sickle into scorn was turned:
With iron to cleave the soil of earth they 'gan,
And the contentions of uncertain war
Were rendered equal.
And, lo, man was wont
Armed to mount upon the ribs of horse
And guide him with the rein, and play about
With right hand free, oft times before he tried
Perils of war in yoked chariot;
And yoked pairs abreast came earlier
Than yokes of four, or scythed chariots
Whereinto clomb the men-at-arms. And next
The Punic folk did train the elephants-
Those curst Lucanian oxen, hideous,
The serpent-handed, with turrets on their bulks-
To dure the wounds of war and panic-strike
The mighty troops of Mars. Thus Discord sad
Begat the one Thing after other, to be
The terror of the nations under arms,
And day by day to horrors of old war
She added an increase.

Bulls, too, they tried
In war's grim business; and essayed to send
Outrageous boars against the foes. And some
Sent on before their ranks puissant lions
With armed trainers and with masters fierce
To guide and hold in chains- and yet in vain,
Since fleshed with pell-mell slaughter, fierce they flew,
And blindly through the squadrons havoc wrought,
Shaking the frightful crests upon their heads,
Now here, now there. Nor could the horsemen calm
Their horses, panic-breasted at the roar,
And rein them round to front the foe. With spring
The infuriate she-lions would up-leap
Now here, now there; and whoso came apace
Against them, these they'd rend across the face;
And others unwitting from behind they'd tear
Down from their mounts, and twining round them, bring
Tumbling to earth, o'ermastered by the wound,
And with those powerful fangs and hooked claws
Fasten upon them. Bulls would toss their friends,
And trample under foot, and from beneath
Rip flanks and bellies of horses with their horns,
And with a threat'ning forehead jam the sod;
And boars would gore with stout tusks their allies,
Splashing in fury their own blood on spears
Splintered in their own bodies, and would fell
In rout and ruin infantry and horse.
For there the beasts-of-saddle tried to scape
The savage thrusts of tusk by shying off,
Or rearing up with hoofs a-paw in air.
In vain- since there thou mightest see them sink,
Their sinews severed, and with heavy fall
Bestrew the ground. And such of these as men
Supposed well-trained long ago at home,
Were in the thick of action seen to foam
In fury, from the wounds, the shrieks, the flight,
The panic, and the tumult; nor could men
Aught of their numbers rally. For each breed
And various of the wild beasts fled apart
Hither or thither, as often in wars to-day
Flee those Lucanian oxen, by the steel
Grievously mangled, after they have wrought
Upon their friends so many a dreadful doom.
(If 'twas, indeed, that thus they did at all:
But scarcely I'll believe that men could not
With mind foreknow and see, as sure to come,
Such foul and general disaster.- This
We, then, may hold as true in the great All,
In divers worlds on divers plan create,-
Somewhere afar more likely than upon
One certain earth.) But men chose this to do
Less in the hope of conquering than to give
Their enemies a goodly cause of woe,
Even though thereby they perished themselves,
Since weak in numbers and since wanting arms.

-- Lucretius, "De Rerum Natura", 5.1281-5.1349,
trans. William Ellery Leonard, 1916.