It consists of an indefinite series ("tirada") of verses, in which the even-numbered lines have a near-rhyme (assonance) and the odd lines are unrhymed.
The poems in this sequence are nearly all written in lines of irregular length and irregular assonances and derive most obviously from the "cancionero" tradition.
In addition, the discovered affinities in the book usually rest on simple assonances, without a real correspondence with the phonological processes of the concerned languages.
