"Notes on Central América, particularly the States of Honduras and San Salvador." N. York, 1855.—German translation, Leipzig, 1856.—French version, Paris, 1855.—Spanish, Paris, 1856, (two different translations.)
"Honduras, Descriptive, Historical and Statistical." London, 1870.
"Honduras and Guatemala." "The National Intelligencer." N. York, 1854.
"The Ruins of Tenampua." Although in Honduras, they appear traditionally connected with Copan. N. York, 1853, in "Proceedings of the Historical Society of New York."
"Monograph of Authors who have Written on the Languages of Central America." Albany, 1861.—A very valuable and important contribution to bibliography.
Carl Scherzer. "Wanderungen durch die mittel-amerikanischen Freistaaten." Braunschweig, 1857.—English version, London, 1857.
"Narrative of the Circumnavigation of the Globe by the Austrian frigate Novara." London, 1861. (The official reports on the results of the circumnavigation, &c., are very rare.)
"Die Indianer von Ixtlahuacan." Vienna, 1856.
"Ein Besuch bei den Ruinen von Quirigua." Vienna, 1855.