I am the great grandaughter of Timothy O'Brien (who became a Captain) and I have never seen anything about him on the net. No one in the family even knew he was wounded. I have a nice note from WL Kirkland presenting Timothy a horse on behalf of his friends for his "soldierly conduct" on April 9, l864.
I have his furniture, and lots of dates of things. But I don't know his wife's name or his parents. I know he was presented a nice sword and his obituary says he became a prosperous butcher after the war and that the old english law of not letting butchers serve on juries would be suspended in his case as he was a kind and gentle man.