Columbia subject headings:
Cuba--History--Insurrection, 1868-1878.
Espionage, Cuban--History--19th century.
Espionage--Cuba--History--19th century.
Intelligence service--Cuba--History--19th century.
Martí, José, 1853-1895.
Harvard subject headings:
Princeton subject headings:
Cuba--History--1878-1895.
Cuba--History--Insurrection, 1868-1878.
Espionage, Cuban--History--19th century.
Martí, José, 1853-1895--Knowledge--Espionage.