Chalk was a country that was the location of Aching Farm, home of Tiffany Aching. It is reminiscent of Pratchett's native Wiltshire.

The land is named after the chalky stone that it sits upon, which apparently makes it very difficult to raise witches. Despite that, there have been at least two known witches native to the Chalk, Granny Aching and Tiffany Aching.

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