I completely understand if this one gets shot down; it's small and useless on purpose. (It's also headcanon that she'd have known this, but I balanced that by picking something from canon that would have plausibly been around in Rebecca's time.) ANYWAY.

Player: Jill
Character: Becky Samson
Reason for Echo: Karson's AMERICAAAA FUCK YEAH Fourth of July post, and her discussion on the thread about historical accuracy.
What is returned: Memory of the properties of Ben Franklin's lightning rod, with absolutely no additional context.