Archaeologist Tom Rust, PhD of Montana State University Billings, carried out a detailed archaeological study of the proposed site and, using modern tools and technology, made convincing discoveries. Where Clark's camp symbol was mapped, a fire feature and latrine were found with the configuration of military encampments of the time. Traces of mercury confirmed the location of the latrine, since medication used by Expedition members contained mercury. The discovery of trace mercury is consistent with the other two confirmed camp sites, Travelers Rest near Lolo, Montana, and Lower Portage near Great Falls, Montana. A lead ball was also found near the latrine. Testing showed it is a statistical match to lead found at Travelers Rest and consistent with the samples collected from the mines where lead was obtained for the Expedition. Charcoal within the fire feature, traces of mercury, and the lead ball were all found at the same depth, which added to the confidence this is where Clark camped and constructed canoes.