It's a shame that my time machine is in the shop.

If I could, I'd hop in my trusty time machine and travel through the decades, grabbing people by the shoulders and shouting, "WRITE something on the back of your pictures!" in my most menacing voice. I've got BOXES of pictures in the attic, and I can't tell you who most of these people are. These first two are "tintypes" -- a quick google search told me that they would've been taken somewhere between 1851 and 1900:

I'll include a few more, about which I know nothing. Just that they're old pictures of old-looking people. Does anyone look familiar to any of you of the current -- ahem -- older generation?