Thanks to a dose of man flu, I've not been sleeping well, and the other night found myself counting sheep, Yan, Tan, Thethera, Mether, Pip, Azer, Sezar, Akker, Conter, Dick. Where the heck had that come from? The following evening we sat down to watch a documentary about Jake Thackray (Yorkshire's answer to George Brassens) in which he sang a Swaledale shepherd's song "Yan Tean Tethera". Spooky!