More than 20 unpublished poems by the late Nobel laureate Pablo Neruda, most of them taking up romantic themes, have been discovered in boxes of his papers in Chile and will be published in Latin America and Spain in 2014 and 2015, according to reports from Spain.

Officials at the Pablo Neruda Foundation in Chile made the initial find, which was announced Wednesday by the Barcelona-based publisher Seix Barral. The poems are said to date from the 1950s and '60s, when Neruda wrote many of his most beloved works, including "The Captain's Verses," and "100 Love Sonnets."

The only other unpublished works of Neruda to appear after his death were a 1980 collection of poems written during his youth and a 1996 collection of adolescent poems titled "Cuadernos de Temuco" (Temuco Notebooks).