I made a clay tablet and wrote a Napoleon quote on it,then I broke it into pieces and buried it in my backyard. I also got a quarter, covered it in clay to mimic coin balls found while metal detecting. Do you think they will be worth anything in future years?

Nobody wants to see literature by frogs, so no.

I'll write the location of some cool non-existent stuff on a tablet and put it in a metal box and bury it.

Oh yeah, then the future archaeologists would be so confused!

@Major General Smedley Butler

That's a troll capsule. Would be even funnier if you say: in {x;y} coordinates there's a cool stuff; then they go there and find another msg saying the cool stuff is in {x';y'} and you continue the loop of a few dozen coordinates. The last one says the cool stuff is a few meters/feet away from the first coordinate. And then you write a note: "you stupid bra, there's no cool stuff at all!".

@Major General Smedley Butler

That's a troll capsule. Would be even funnier if you say: in {x;y} coordinates there's a cool stuff; then they go there and find another msg saying the cool stuff is in {x';y'} and you continue the loop of a few dozen coordinates. The last one says the cool stuff is a few meters/feet away from the first coordinate. And then you write a note: "you stupid bra, there's no cool stuff at all!".