* 1846 – أول أمين لمعهد سميثسونيان حتى 1878* 1848 – Edited Ephraim G. Squier and Edwin H. Davis' Ancient Monuments of the Mississippi Valley, the Institution's first publication.
*1846 – First secretary of the Smithsonian Institution until 1878*1848 – Edited Ephraim G. Squier and Edwin H. Davis' "Ancient Monuments of the Mississippi Valley", the Institution's first publication.