Posted here (downloadable Word document above) is the preface, by Eugenio Florit, to Selected Writings of Juan Ramón Jiménez, translated by H. R. Hays (New York: Farrar, Straus and Cudahy, 1957). It is a very well written essay, and Florit provides a comprehensive, brilliant overview of Jiménez’s oeuvre.
I believe this book — and presumably Florit’s preface — are not readily available.
Eugenio Florit (1903-1999) was a Cuban-American poet, critic and essayist and a Professor of Spanish at Columbia University.
— posted by Roger W. Smith