I am trying to find three pieces of information about Colonel William A. Parham, 41st Virginia Infantry Regiment, Mahone's brigade in September 1862 - with references.

1. What was Colonel Parham's date of rank for promotion to Colonel. I have found one reference that indicates it may have been July 29, 1862, but I would like confirmation.
2. When/where did Mahone's remnant of a brigade (approximately 82 men) join Pryor's brigade before the battle of Sharpsburg/Antietam? It may have been at Halltown, Virginia on September 16, but that is only a guess, at this time.
3. Was Colonel Parham wounded at Antietam/Sharpsburg?