Danny, I'm not familiar with those letters. From his official reports, he comes across to me as a little excitable perhaps, but not what I'd call an alarmist. I hope you can find those letters. Very curious about what they say about the man.
I'm not aware of his being disliked by his own regiment, but he was distinctly unpopular with the 18th Arkansas, which was field-consolidated with Lyles' 23rk Arkansas. You've probably seen Colonel Steedman's report of June 30, 1863 (he commanded the Left Wing at Port Hudson)--
I learn that there is serious prejudice in the Eighteenth against Colonel Lyles. Perhaps an intimation to the colonel to be cautious in his orders to them might avoid difficulties. But, major, some Arkansas soldier will have to be shot by court-martial before they are convinced that they have to obey orders irrespective of their own feelings. I have lost confidence in their reliability in emergencies. They are under no discipline.
In case any of those men refuse to go this morning, I will forward the list of names at once, and ask that a general court-martial be called immediately.