A television licence detector calls at a house in Leith and asks to see the licence. But the wee woman is in an awful hurry to catch her bus. As she flies down the stairs she shouts back: "A've got my licence. It's on the mantelpiece under the Wally Dug. Call back when my man's in and he will show you."
When the detector calls back later, her man says: "Aye, we have a licence, but I don't know where it is, and the wife's no in." The inspector says: "It's under the Wally Dug!!"
Back comes the wee man with the licence, saying "Wow, that's some detection machine you guys have got!"