Fort de Cavagnial
While the ruins of the site were still visible when Meriwether Lewis and William Clark ventured in the area during their famed 1804 westward expedition , all traces of the fort were eventually lost by the mid-19th century . 
<triplet> Meriwether Lewis <subj> westward expedition <obj> participant in <triplet> William Clark <subj> westward expedition <obj> participant in