The Iambic foot is briefly thus defined:
Two syllables, a short with long behind:
Repeat it six times o'er, so quick its beat,
'Tis trimeter, three measures for six feet:
At first it ran straight on; but, years ago,
Its hearers begged that it would move more slow;
On which it took, with a good-natured air,
Stout spondees in, its native rights to share,
Yet so that none should ask it to resign
The sixth, fourth, second places in the line.
But search through Attius' trimeters, or those
Which Ennius took such pleasure to compose,
You'll rarely find it: on the boards they groan,
Laden with spondees, like a cart with stone,
And brand our tragedy with want of skill
Or want of labour, call it which you will.
What then? false rhythm few judges can detect,
And Roman bards of course are all correct.

What shall a poet do? make rules his sport,
And dash through thick and thin, through long and short?
Or pick his steps, endeavour to walk clean,
And fancy every mud-stain will be seen?
What good were that, if though I mind my ways
And shun all blame, I do not merit praise?
My friends, make Greece your model when you write,
And turn her volumes over day and night.

"But Plautus pleased our sires, the good old folks;
They praised his numbers, and they praised his jokes."
They did: 'twas mighty tolerant in them
To praise where wisdom would perhaps condemn;
That is, if you and I and our compeers
Can trust our tastes, our fingers, and our ears,
Know polished wit from horse-play, and can tell
What verses do, and what do not, run well.

Thespis began the drama: rumour says
In travelling carts he carried round his plays,
Where actors, smeared with lees, before the throng
Performed their parts with gesture and with song.
Then AEschylus brought in the mask and pall,
Put buskins on his men to make them tall,
Turned boards into a platform, not too great,
And taught high monologue and grand debate.
The elder Comedy had next its turn,
Nor small the glory it contrived to earn:
But freedom passed into unbridled spite,
And law was soon invoked to set things right:
Law spoke: the chorus lost the power to sting,
And (shame to say) thenceforth refused to sing.

Our poets have tried all things; nor do they
Deserve least praise, who follow their own way,
And tell in comedy or history-piece
Some story of home growth, not drawn from Greece.
Nor would the land we love be now more strong
In warrior's prowess than in poet's song,
Did not her bards with one consent decline
The tedious task, to alter and refine.
Dear Pisos! as you prize old Numa's blood,
Set down that work, and that alone, as good,
Which, blurred and blotted, checked and counter-
checked,
Has stood all tests, and issued forth correct.

Because Democritus thinks fit to say,
That wretched art to genius must give way,
Stands at the gate of Helicon, and guards
Its precinct against all but crazy bards,
Our witlings keep long nails and untrimmed hair,
Much in brown studies, in the bath-room rare.
For things are come to this; the merest dunce,
So but he choose, may start up bard at once,
Whose head, too hot for hellebore to cool,
Was ne'er submitted to a barber's tool.
What ails me now, to dose myself each spring?
Else had I been a very swan to sing.
Well, never mind: mine be the whetstone's lot,
Which makes steel sharp, though cut itself will not.
Although no writer, I may yet impart
To writing folk the precepts of their art,
Whence come its stores, what trains and forms a bard,
And how a work is made, and how 'tis marred.

Of writing well, be sure, the secret lies
In wisdom: therefore study to be wise.
The page of Plato may suggest the thought,
Which found, the words will come as soon as sought.
The man who once has learned to comprehend
His duty to his country and his friend,
The love that parent, brother, guest may claim.
The judge's, senator's, or general's aim,
That man, when need occurs, will soon invent
For every part its proper sentiment.
Look too to life and manners, as they lie
Before you: these will living words supply.
A play, devoid of beauty, strength, and art,
So but the thoughts and morals suit each part,
Will catch men's minds and rivet them when caught
More than the clink of verses without thought.

To Greece, fair Greece, ambitious but of praise,
The Muse gave ready wit, and rounded phrase.
Our Roman boys, by puzzling days and nights,
Bring down a shilling to a hundred mites.
Come, young Albinus, tell us, if you take
A penny from a sixpence, what 'twill make.
Fivepence. Good boy! you'll come to wealth one day.
Now add a penny. Sevenpence, he will say.
O, when this cankering rust, this greed of gain,
Has touched the soul and wrought into its grain,
What hope that poets will produce such lines
As cedar-oil embalms and cypress shrines?

A bard will wish to profit or to please,
Or, as a tertium quid, do both of these.
Whene'er you lecture, be concise: the soul
Takes in short maxims, and retains them whole:
But pour in water when the vessel's filled,
It simply dribbles over and is spilled.

Keep near to truth in a fictitious piece,
Nor treat belief as matter of caprice.
If on a child you make a vampire sup,
It must not be alive when she's ripped up.
Dry seniors scout an uninstructive strain;
Young lordlings treat grave verse with tall disdain:
But he who, mixing grave and gay, can teach
And yet give pleasure, gains a vote from each:
His works enrich the vendor, cross the sea,
And hand the author down to late posterity.