Harvard's Widener Library is the repository of many scarce and unique Latin American pamphlets published during the 19th and the early 20th centuries. One of the few institutions to have consistently collected Latin American pamphlets, Harvard has benefited from collections formed by Luis Montt (Chile), Nicolás Acosta (Bolivia), Manuel Segundo Sánchez (Venezuela), José Augusto Escoto (Cuba), Blas Garay (Paraguay), Charles Sumner, John B. Stetson and others. Chile, Cuba, Bolivia and Mexico are the countries most heavily represented in this collection.