Heard a great little show on the public radio yesterday. They had Ken Jennings on and quoted some 200 year old document in which a guy criticized his laborers for not wanting to eat 'the pluck of a pig.' The moderator gave 3 possible answers to what is 'the pluck of a pig' to include pigs feet and the heard and liver of a pig. To me it seemed likely he answer would be the latter and that was correct. This derives presumably from the slaughtering of a pig during which you pluck the organs from it. What is fascinating is that we say that a person or soldier has pluck based on the same origin.