President Jefferson got Charles an Army commission. Unfortunately, he died while in camp in 1806.
Benton Merrill's "Jefferson's Nephews" is a good, if sad source on the Col. Charles L. Lewis family and tragedy.
Apparently my mother is descended from one of the Lewis sons (i suspect Charles as he fathered another mulatto bamed Matilda) via an enslaved woman. That union produced Ellen "Nelly" Lewis (married a Youel). M