Copper wire pieces-more than one site

[IowaRelic]

Over the past year I have found a few rats nest windings of this wire at 2 places 50 miles apart. Each were settler era 1830s homes/ farms. After unwinding this set, the pieces are twisted, my others are all uniformly cut and bent over. The wire is solid pieces of copper/brass and coincidentally fit through the holes of some lead pendants I have found... thoughts?

 

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[ANTIQUARIAN]

I'm thinking it's lighting rod ground wire, I've found this on very old home sites as well.

Dave