As well as the more well known mills using water wheels, such as the one that stands as an ornamental feature at Llangollen restaurant, the Corn Mill, and the historic Rossett Mill, there are clues that water power has been harnessed elsewhere.

BBC: Rossett Mill is an historic landmark in the town

It was used by packhorses transporting produce such as corn from Fingle Mill, and wood products.

BBC: Devon's rivers: The River Teign

For example, when you nixtamalize corn to make tortillas, the traditional recipe is to boil the corn with limestone, let it sit overnight outside, then grind it at the mill.

WSJ: Mexico's Culinary Genius | Soapbox