Unfortunately, I can't figure out as yet just why he's in the album. He doesn't seem to relate to anyone else. Nearly all the photos are identified, but he's the only "Knaube" in the book. The book belonged to the "Ensminger" family. Some of the other names were Wallick, Loucks, Sweitzer, Lentz, Folkemer, Gable, Schaeffer, Frank, Bubb, Kendig, Weiser, Sharp, Trout, Ziegler, Crumbling, Brenner, and Herrmann. If you see a familiar name that might coincide with a family name you know, let me know and I'll email the corresponding photos. I can say that, in my opinion, nearly everyone in the album appears to be an extended family member rather than a friend.