I have been unable to find any record of the 9th Georgia Artillery Battalion being involved in the Battle of Lyncyburg, July 17, 1864.

Here is a mention of the unit's being stationed there and of one who died there.

Being mortally wounded, it is quite possible that he was sent home and died there. And then, he could be among the many unknowns buried at Lynchburg.

.....

Passed the winter in East Tennessee and Southwest Virginia and in June 1864 was ordered to Lynchburg and assisted in defending the place against the enemy under General Hunter and after his repulse and retreat went with General Earley’s corps in pursuit and remained in general Earl during the subsequent operations in the valley of Virginia after they were ordered to Richmond taking part in its defense and surrendering with Lees Army at Appomattox Courthouse

Moon D J – Died May 1864 buried at Lynchburg Cemetery Virginia Records Indicate May 27 1864 body was removed and sent to Atlanta, Ga. Died at Millers,

http://ancestrallychal