- Personal Narrative of Travels to the Equinoctial Regions of the New Continent during the years 1799-1804, by A. de Humboldt and A. Bonpland; with ... into English by H. M. Williams. VOL. V
- Personal Narrative of Travels to the Equinoctial Regions of the New Continent during the years 1799-1804, by A. de Humboldt and A. Bonpland; with ... into English by H. M. Williams. Vol. I
- Researches concerning the Institutions and Monuments of the ancient Inhabitants of America. With descriptions and views of ... scenes in the ... into English by H. M. Williams. Vol. II
- Researches concerning the Institutions and Monuments of the ancient Inhabitants of America. With descriptions and views of ... scenes in the ... translated into English by H. M. Williams.