Columbia subject headings:
Arcos, Santiago, 1822-1874--Correspondence.
Intellectuals--Chile--Correspondence.
Presidents--Argentina--Correspondence.
Sarmiento, Domingo Faustino, 1811-1888--Correspondence.
South America--History--19th century.
World politics--19th century.
Harvard subject headings:
Arcos, Santiago--Correspondence.
Argentina--History--1860-1910.
Intellectuals--Chile--Correspondence.
Princeton subject headings:
Arcos, Santiago, 1822-1874--Correspondence.
Intellectuals--Chile--Correspondence.
Presidents--Argentina--Correspondence.
Sarmiento, Domingo Faustino, 1811-1888--Correspondence.
South America--History--19th century.
World politics--19th century.