Dorothy,
Your question could possibly be answered by the NPS (National Park Service) personnel at the Wilderness Battlefield. I will hazard a guess: that with the possible exception of shipping the body back home (rare, but not unheard of in wealthy officer's families), that he was buried quickly, and close to the hospital he died in around Gordonsville. As the Confederates dealt with thousands of casualties, the hospital staff would have disposed of many, many bodies every day.Also, what they would have considered a "hospital", could have been a courthouse, church, barn, residence, etc., almost any building that could house wounded men. Most soldiers would have been buried quickly (remember, no refridgeration was available, and embalming was a brand new science at that time). There is also the possibility, that due to the nearness of Richmond, since he was an officer, that he could have been buried in Hollywood Cemetery there. Good luck on your search....