Old Molly Metcalfe is a wonderful song, and it was written by Jake Thackray. In it, he counts up to 20: yan tan tether mether pip azer sazer acker conter dick yanerdick tanerdick thetheradick metheradick bumfit yanerbum tanerbum tetherabum metherabum jiggit (don't know if the spellings are correct) which is a North Riding of Yorkshire way of counting sheep. I forget which album it's on, but if you want to know I'll post it. Unfortunately you can't buy this album except if you're lucky at a record fair.