Who could have predicted an art caper ending with a stolen piece being returned to the scene of the crime? One of two Russian masterpieces lifted from the walls of an Upper West Side museum has now been mailed back in one piece. The NY Post reports that the Nicholas Roerich Museum staff "were shocked Friday when the mailman delivered the $70,000 painting" (pictured) in a manila envelope where it was pressed between two pieces of cardboard. One employee told the paper, "I thought it was some junk mail. I opened the envelope. Everybody started jumping up and down." The sender even left a name and return address on the envelope (which was mailed from Brooklyn), though there's no word on if it's legit.