Wounded and sick Confederate POWs captured during Hood's 1864 Middle Tennessee Campaign (November and December 1864) were examined and treated in several general hospitals around Nashville. Those that died in Nashville were initially buried in numbered graves in the old Nashville City Cemetery. It has been my understanding that after the war, the UDC purchased what is now Confederate Circle at Mount Olivet Cemetery in Nashville and removed all Confederate wartime burials that could be found in the surrounding Nashville area to Confederate Circle.
Tim Burgess of Hendersonville, Tennessee has been instrumental in identifying many of the Confederate dead buried at Mount Olivet. E-mail me directly and I can give you his contact information.