I love mysterious stuff like this. For the love of God, man OPEN IT !
Reminds me of these little notes I found in the woods where I squirrel hunted when I was a teenager.
They were in tiny envelopes tied to branches with yarn, and had little messages like... "The time is near", and another 3 trees away said "He is coming", and then there would be another one saying " Cleanse yourself". Then "Are you ready?"
It was pretty dam creepy until I came across the one that had a drawing of Jesus on it and directions to a little one room country church with boarded up windows and a parking lot big enough for maybe 6 cars and a hitching post.
It worked, I went. Got some weird stares too (Long hair, bell bottoms, prolly reeking of Colombian shake, and obviously quite stoned). Listened politely to the sermon, sang a few songs, got saved....and then put all the little notes in the collection plate.