The only doctor to examine Lewis's body did not do so until 40 years later, in 1848. The Tennessee State Commission, including Dr. Samuel B. Moore, charged with locating Lewis's grave and erecting a monument over it, opened Lewis's grave. The commission wrote in its official report that though the impression had long prevailed that Lewis died by his own hand, "it seems to be more probable that he died by the hands of an assassin." In the book "The History of the Lewis and Clark Expedition", first printed in 1893, the editor Elliott Coues expressed doubt about Thomas Jefferson's conclusion that Lewis committed suicide, despite including the former president's "Memoir of Meriwether Lewis" in his book.