Description: [caption id="" align="aligncenter" width="261" caption="A project participant uses calipers to measure a tree on Barro Colorado Island during Smithsonian Tropical Research Institute (STRI) census, similar to the one in Malaysia, on the biological diversity of tropical rainforests, 1985?, by Carl Hansen, Photographic print, Smithsonian Institution Archives, Accession 98-015 Box
Description: On this day in 1850, a young man was killed in the Castle, the first of four deaths to occur within its walls. William H. Page was working in the building, which was still under construction at the time, when he fell to his death.