Betty --

Since the regiment didn't come under fire until the Battle of Shiloh, we can rule out combat as a cause of death.

The numbers on the cards you mentioned were used by War Department clerks for accounting purposes only. They have no meaning to us. It's not entirely clear from your post as if you have the National Archives service file for this man, which should include all available information. Is that the case?

Unless the records states that a soldier was sent to a hospital, he probably received treatment at a field post not far from his regimental or brigade camp. If a soldier was sick he would have been left in camp when the regiment marched away.

In this particular case, if the death date is accurate, there's a good possibility family members came to camp to collect his body. He may have even been taken home before dying. Otherwise he's buried in an unmarked grave somewhere between Henderson and Columbus KY.