L'Allegro is a pastoral poem by John Milton published in his 1645 Poems. L'Allegro (which means "the happy man" in Italian) is invariably paired with the contrasting pastoral poem, Il Penseroso ("the melancholy man"), which depicts a similar day spent in contemplation and thought. It is uncertain when L'Allegro and Il Penseroso were composed because they do not appear in Milton's Trinity College manuscript of poetry. However, the settings found in the poem suggest that they were possibly composed shortly after Milton left Cambridge. — Excerpted from L'Allegro on Wikipedia, the free encyclopedia.