He is said to have written a poem called Pontius Glaucus when he was fourteen years old.

This was no doubt a translation from the Greek, as were most of the poems that he wrote, and many portions of his prose treatises.[35] Plutarch tells us that the poem was extant in his time, and declares that, "in process of time, when he had studied this art with greater application, he was looked upon as the best poet, as well as the greatest orator in Rome." The English translators of Plutarch tell us that their author was an indifferent judge of Latin poetry, and allege as proof of this that he praised Cicero as a poet, a praise which he gave "contrary to the opinion of Juvenal." But Juvenal has given no opinion of Cicero's poetry, having simply quoted one unfortunate line noted for its egotism, and declared that Cicero would never have had his head cut off had his philippics been of the same nature.[36] The evidence of Quintus Mucius Scaevola as to Cicero's poetry was perhaps better, as he had the means, at any rate, of reading it.

He believed that the Marius, a poem written by Cicero in praise of his great fellow-townsman, would live to posterity forever.

The story of the old man's prophecy comes to us, no doubt, from Cicero himself, and is put into the mouth of his brother;[37] but had it been untrue it would have been contradicted.
The Glaucus was a translation from the Greek done by a boy, probably as a boy's lesson It is not uncommon that such exercises should be treasured by parents, or perhaps by the performer himself, and not impossible that they should be made to reappear afterward as original compositions.

Lord Brougham tells us in his autobiography that in his early youth he tried his hand at writing English essays, and even tales of fiction.[38] "I find one of these," he says, "has survived the waste-paper basket, and it may amuse my readers to see the sort of composition I was guilty of at the age of thirteen.