Here are some links that may be of help in your research of the 16th Texas Dismounted Cavalry:
http://www.cemetery.state.tx.us/pub/user_form.asp?step=1&pers_id=848
James Decatur Naylor
http://www.lib.utexas.edu/taro/utcah/02045/cah-02045.html
Chambers, E. W., diary
http://files.usgwarchives.net/tx/coke/military/civilwar/csa/126bios.txt
Private Henry Davis Pearce