Nancy, Every now and then something about the Civil War really gets to me, and you seeking your ancestors grave has gotten to me tonight. Your question is a heart breaking one. I have spent 15 years chasing Company A of the 11th Mississippi. They were brigaded with the 42cd Ms. at Gettysburg. As a result of this research, I have looked into most of the material on the burial data of the Mississippians at Gettysburg. I know that untold thousands of Mississippians have asked this question about their family member from 1863 to today. Sitting here, in my home office at 11 pm at night, I can feel a small amount of the broken hearts and grief of parents, siblings, wives, girlfriends and descendents as they wondered where their family member ended up. War is truly terrible, and yet there are some causes worth fighting for. Those brave Southern boys have certainly earned the right to be "found" and remembered.
Doctors Weaver and O'neal made a list of all Confederate grave locations and names on any marked graves in 1863 and '64 when they exhumed the Union soldiers for the National Cemetery at Gettysburg. They only removed Union soldiers. Gettysburg National Park has a copy of this list.
In 1871,'72 and '73 Dr. Weavers son exhumed the Confederate dead using this list. He made a list of locations and names, IF KNOWN, of all these removals. Most were not identified. Gettysburg National Park also has this list. The National Archives may also have copies of these two lists. I have seen both of them at GNP but only copied the 11th MS. men. I have all of Gregory Coco's books on the Gettysburg Confederate dead and your ancestor is not mentioned in any of them.
One sad part of all of this is that, when a Confederate body was identified by Dr Weaver, when he did all the exhumations in the 1870s, the bones were placed in a big box with all the other unidentified bones. Then, they were shipped back to Hollywood cemetery where they were all buried together with no individual identification. The marker on that hill only says "Gettysburg Dead".
Since the Lt. died at a Union hospital he was very possibly identified on his grave. He MAY be on one or both lists. He is most likely buried at Hollywood in Richmond.
Your best source may be a man named Edward Richter in NY state. He worked for many years collecting information for a book on the CSA dead at Gettysburg. He is most likely THE expert on this subject. Please Email me for the last phone number I have on him. I have not talked to him for a number of years.
Nancy, I hope this will be of some help. "Our friends are not dead until they are forgotten" May those boys never be forgotten. Please Email me.