Transhumance was practised, people moving with their animals from a low-lying "hendre" farm in winter, to an upland "hafod" farmhouse in summer. Transhumance declined through the 18th century and collapsed at its end as land was enclosed, both upland and lowland. Over 81,000 hectares of Welsh common land was rapidly enclosed and attached to existing landholdings between 1793 and 1815.[7]