My father found a rock in the driveway that caught his eye. It was a gray rock, glittery, with black speckles over one side. His eyesight isn't great so he didn't notice that the speckles, and this could just be my brain trying to make sense of something random, seem to be letters and numbers. In the middle, fairly clear, is 1648, above that something that seems like something, something E L. Above is no or on depending on how you hold it and some markings look almost like old runes or something. It's just that most of the black marks look like numbers or letters, if it were a couple I'd discount it but...Keep in mind, I am in America, in Louisville which was settled in the 1700's. I am going to try and borrow a camera w/ a macro setting to photograph this thing. When I do I'll post it, but any ideas?