Assigned to Quarles' Brigade, the 4th Louisiana Regiment took part in S. D. Lee's bloody and fruitless attacks on the afternoon of July 28, 1864. Confederate accounts call this the Battle of the Poorhouse, or Lickskillet Road; Federal accounts refer to their victory as Ezra Church. Apparently David Lowrance was among thousands of Confederates who bled on this unfortunate battlefield.
Harry Davis, Co. "G", 46th Ohio, brought off the "very handsome" flag of the 30th Louisiana Regiment during the fighting that day.
You may be interested in this recent publication on the 4th Louisiana Regiment, available through the message board: