Treasure

or maybe a caterpillar

Dear son,

I hope this letter finds you in good health.  If you are reading this, then you have located and unearthed my buried treasure. Good job. Hopefully you won’t be too disappointed, I won’t blame you if you are. I know that I would have been upset, if my father’s fabled treasure hoard had turned out to be an old chest filled with milk bottles, but I was never one to fully appreciate the finer things in life. Not that my treasure is necessarily just an old chest filled with milk bottles. But yeah, that is totally what it is. Sorry.