Description: [caption id="" align="aligncenter" width="415" caption="National Geogrqaphical Society photographer Richard Stewart is photographing an archological site being excavated by Matthew and Marion Stirling of the Smithsonian's Bureau of American Ethnology, south of Parita, Herrera, Panama, March 2, 1948, by Alexander Wetmore, Photographic print, Smithsonian Institution Archives,