Meriwether Lewis died at Grinder's Stand, Hohenwald, Lewis Co., TN. Google Grinder's Stand and Lewis Co., TN there maybe additional info you may find, either way it’s an interesting read. Since I live in E.TN, a couple of years ago there was talk of exhuming Meriwether Lewis body to determine if he had committed suicide or was murdered. It wasn’t done. Google exhuming Meriwether Lewis
But this has been known: "A document reveals that the Tennessee monument committee actually opened the grave of Meriwether Lewis to confirm that they had the right gravesite, and examined his upper torso. One of the members of the committee, Samuel B. Moore, was a physician. (History and Genealogy-State Records-Acts of Tennessee, 1831-1850). It was not their purpose to investigate the cause of Lewis’s death. However, later in their 1850 Monument Committee Report to the General Assembly of Tennessee, they stated:
“The impression has long prevailed that under the influence of disease and body—of hopes based upon long and valuable services—not merely deferred but wholly disappointed—Governor Lewis perished by his own hands. It seems to be more probable that he died by the hands of an assassin.”http://www.lewisandclarktravel.com/index.php/site/was_meriwe...
Again an interesting read.