My Farmhouse Cookery Book says that Toad-in-the-Hole, also known in Norfolk as Pudding-pye-doll, has changed its ingredients over the centuries. According to one theory, toad-in-the-hole began when 18th century cooks first wrapped a small piece of mutton in a large piece of suet crust to make the meat go further. This dish was thought to resemble a toad in a hole. But for the majority of the population then, as now, a 'toad' is a sausage and the batter a Yorkshire pudding.