The Forme of Cury(e) is one of the earliest cookbooks written in English. The 14th century instructional pamphlet was written by a chef working in the court of King Richard II. One of the recipes calls for a the blood of a porpoise to be mixed with oatmeal, pepper and spices and boiled in the porpoise's stomach before serving. As recipes go, it's similar to haggis... but much more upsetting.