You're very welcome. The 29th PA casualty list was taken from The Press (Philadelphia, PA) July 11, 1863, page 2. The lieutenant-colonel's colored servant is mentioned by name at the very end of the article.
I too am interested in Gettysburg battlefield trophies and relics, as well as shell and bullet-struck buildings, witness rocks and trees (if they are tied to a specific individual or action) and unintentionally unearthed soldiers' remains. Are you considering writing a book?