Found on the Soil and Health Library website:
The estimated calorie requirements of a resting man weighing 160 lbs., is 2200 calories. Sleeping twenty-four hours, this man would expend only 1680 calories. The calorie requirements of woman are estimated to be much lower–a seamstress requiring 1800 calories a servant 2800 calories and a wash-woman 3200 calories.
I have no idea when this quote was written, but I imagine that this calculation would probably hold true over the centuries, and would vary depending on the person’s age and size.
Frank Holl, Song of the Shirt, 1875
Jane Austen's World 