Edale is the southern terminus of the Pennine Way, a 268-mile national trail which transverses most of the Pennines and ends at Kirk Yetholm in the Scottish border. Other villages within the park include Flash, Hathersage, Hartington, Ilam and Tideswell. The towns of Glossop, Chapel-en-le-Frith, Buxton, Macclesfield, Leek, Ashbourne, Matlock and Chesterfield are on the fringes of the national park. The spa town of Buxton was developed by the Dukes of Devonshire as a genteel health resort in the 18th century while the spa at Matlock Bath in the valley of the River Derwent was popularised in the Victorian era. Hayfield is at the foot of Kinder Scout, the highest summit in the area. Other towns and villages fringing the park include Whaley Bridge, Hadfield, Tintwistle, Marsden, Holmfirth, Stocksbridge, Darley Dale and Wirksworth. Several rivers have their sources on the moorland plateaux of the Dark Peak and the high ridges of the White Peak. Many rivers in the Dark Peak and outer fringes were dammed to create reservoirs for supplying drinking water. Streams were dammed to provide headwater for water driven mills; weirs were built for the same purpose. The reservoirs of the Longdendale Chain were completed in February 1877 to provide compensation water, ensuring a continuous flow along the River Etherow which was essential for local industry, and provide drinking water for Manchester. In a report for the Manchester Corporation, John Frederick Bateman wrote in 1846:  The western side of the Peak District is drained by the Etherow, Goyt, and Tame, which are tributaries of the River Mersey. The north east is drained by tributaries of the River Don. Of the tributaries of the River Trent that drain the south and east, the River Derwent is the most prominent. It rises on Bleaklow just east of Glossop and flows through the Upper Derwent Valley where it is constrained by the Howden, Derwent and Ladybower Reservoirs. The reservoirs of the Upper Derwent Valley were built from the early to mid-20th century to supply drinking water to the East Midlands and South Yorkshire. The River Noe and the River Wye are its tributaries. The River Manifold and River Dove in the south west, whose sources are on Axe Edge Moor, flow into the Trent, while the River Dane flows into the River Weaver in Cheshire.