I have no specific information, but am curious about your question. How did you determine that Matthew Hardie was a Lt.? As indicated earlier in this thread, the 28th was formed in early 1862 about a year after the war began and did not exist prior to that time. I did check the roster of the U.S. 2nd Cavalry which was in Texas during a 6 year period leading up to the session of the states, but no Matthew Hardie appears on that list.