Patti,
From the Battalion and Company returns it appears Field and Staff were at Sabine Pass from Dec 1863 until Mar 1865 when Field and Staff where moved to Beaumont, with Companies in SE Texas and SW Lousiana, ie Sabine Pass,Tx., Beaumont,Tx., Nibletts Bluff,La, Calcasicu Pass, La.,Mermenton?,(?hard to read) La. and Fort Manhassett,La.
If you have any question contact me.
Mike