There is some information on Miller, Tochman, and Sulakowski in my book "Lee's Tigers" (LSU Press, 1987). Also Leon Jastremski's papers are housed in the LSU archives and Miller's Civil War letters were published in an article by Forrest P. Conner, "Letters of Lieutenant Robert H. Miller to His Family, 1861-1862" in Virginia Magazine of History and Biography, LXX (1962).