This collection douments Guillermo Luís Guitarte's correspondence with professional colleagues primarily during his time in the United States teaching at Boston College. Many notable linguists, writers, and academics wrote to Guitarte including Manuel Alvar, Gabriel G. Bés, Rodolfo A. Borello, Manuel Alvarez Nazario, Berta Elena Vidal de Battini, Nicolae Iliescu, Olga Cock Hincapié, Enrique Anderson Imbert, and Rafael Lapesa. Also includes letters from his family and legal correspondence.