"That race indocile, and through mountains high
Dispersed, he settled, and endowed with laws,
And named their country Latium, because
Latent within their coasts he dwelt secure.
Tradition says the golden ages pure
Began when he was king." 
But they regard these as poetic fancies, and assert that the father of Picus was Sterces rather, and relate that, being a most skillful husbandman, he discovered that the fields could be fertilized by the dung of animals, which is called stercus from his name. Some say he was called Stercutius. But for whatever reason they chose to call him Saturn, it is yet certain they made this Sterces or Stercutius a god for his merit in agriculture; and they likewise received into the number of these gods Picus his son, whom they affirm to have been a famous augur and warrior. Picus begot Faunus, the second king of Laurentum; and he too is, or was, a god with them. These divine honors they gave to dead men before the Trojan war.
 Æneid, viii. 321.