The River Isle (also known as the River Ile) flows from its source near Combe St Nicholas, through Somerset, England and discharges into the River Parrett south of Langport near Midelney. Several small springs merge into the river near Wadeford it then flows north past Donyatt, Ilminster, Puckington, and Isle Abbotts, before joining the Parrett. The first section of the river falls 250 feet (76 m) in 6 miles (9.7 km) and then falls less steeply falling 80 feet (24 m) during the subsequent 8 miles (13 km). As a result, several mills were built on the upper reaches of the river. At least one mill was in existence at the time of the Domesday Book. These mills were an important part of the local economy connecting with the wool trade.