CovenantInBlood said:

Slightly off-topic, but it seems the origins of the phrase "your goose is cooked" are obscure; the phrase "cook their goose" first appears in print in 1851.

Source: http://www.takeourword.com/TOW191/page2.html
I believe it is a rather reliable saying of the 1400 and 1500's. The phrase "‘The pen,’ replied he, ‘belonged to an old goose of Bohemia, a hundred years old" is related to it and it was stated Oct 30-31, 1517 by The Elector Frederick the Wise' (History of Protestantism, Vol. I. by Dr. J.A. Wylie). There is also a written reference to this in Luther's funeral preached by Johann Bugenhagen (1546).

Reformed and Always Reforming,