Thanks everyone for letting me know about the
So it must have been the 13th Pennsylvania reserves that lost that flag.
Drewry's Bluff, I think that last missing Union flag captured belonged to the 9th New Jersey. They were hit hard and on the front and flank. I would put my money on the 9th New Jersey losing that last flag. The 9th New Jersey did not have time to build up breastworks.
If anyone has any info on the old 9th New Jersey see if I am right or wrong.
Have a good night,