George,

Here is a good history of the unit. Henry Dewolf was the only Lt. Dewolf from Texas that I could find, and part of this comand did fight around Brownsville.
Also, as you will read in this unit history a part of this comand was being chased down by other Confederate units in north Texas.

http://members.tripod.com/~azrebel/page14.html

I hope this helps,
Gary D. Bray