Sharp's South Sea Waggoner. MS. folio.
Shelvocke (George), A Voyage round the World. London, 1726.
Shepard (A. K.), Papers on Spanish America. Albany, 1868.
Ship-Canal Question, State of the. London, n.d.
Shufeldt (Robert W.), Reports of Explorations, Ship-Canal by way of Tehuantepec. (42d Cong., 2d Sess., Ex. Doc. 6.) Washington, 1872. 4to.
Sicard (Felix), Simples Notes sur L'Amérique Centrale. Paris, 1863.
Sierralta, Real Titulo de Gobernador de Costa Rica á Coronado, Abril 8, 1565. In Pacheco and Cárdenas, Col. Doc., tom. xi.
Siglo (El). San Salvador, 1851 et seq.
Silliman (Benjamin), The American Journal of Science. New Haven, 1819 et seq. 107 vols.
Silva (Juan de), Advertencias Importantes acerca del Bven Gobierno de las Indias. Madrid, 1621. folio.