The first sentence of your answers
The promontories that Bede describes in A History of the English Church and People are peaks of high coastal land.
The word 'promontory' refers to the highest part of an area, especially one that extends into some water, like sea or lake. Venerable Bede was an English monk who wrote the history of the church and the people in England. It is an important document describing what life was life at the time, as well as giving an overview of English history.
Not sure what the question is but if it is how does the officers statement portray irony it is the fact that they are eating the murder weapon and demolishing the evidence.