The young poet's parents were simple tillers of the soil, who gave their son a meagre education. In one of his letters he says that his father's library consisted of the _Fueros de Viscaya_ (the old laws of Biscay), the _Fables_ of Samaniego, _Don Quixote_, some ballads brought from Valmaseda or Bilbao, and two or three lives of the saints. Antonio seems to have had from his earliest childhood an ardent love of poetry, and in the passage quoted above he mentions his own compositions. He continues by saying, "I remember one day one of those girls was very sad because her sweetheart was going away for a long time. She wanted a song to express her grief, and I composed one at her request. A few days later she did not need my aid to sing her sorrow: in proportion as it had increased her ability to sing it herself had also increased, for poetry is the child of feeling. Her songs, as well as those I composed, soon became popular in the valley."
When the poet was fifteen years old the civil war waged by Don Carlos was desolating Spain. The inhabitants of Biscay espoused his cause, but Antonio's parents were unwilling to expose their son to the dangers he must run if he remained at home, and therefore decided to send him to a distant relative in Madrid who kept a hardware-shop. "One night in November," says Trueba, "I departed from my village, perhaps--my God!--never to return. I descended the valley with my eyes bathed in tears. The cocks began to crow, the dogs barked, the owls hooted in the mountains, the wind moaned in the tops of the walnut trees, and the river roared furiously rushing down the valley; but the inhabitants of the village slept peaceably, except my parents and brothers, who from the window followed weeping the sound of my footsteps, about to be lost in the noise of the valley. I was just leaving the last house of the village when one of those girls who had so often sought me under the cherry trees approached the window and took leave of me sobbing. On crossing a hill, about to lose the valley from my sight, I heard a distant song, and stopped. That same girl was sending me her last farewell in a song as beautiful as the sentiment that inspired it."