James Garth Marshall

James Garth Marshall (20 February 1802 - 22 October 1873) was an English politician, the Member of Parliament for Leeds (1847-1852).cite web|url=http://www.leighrayment.com/commons/Lcommons1.htm|title=House of Commons constituencies beginnng with "L": Leeds|work=Leigh Rayment's Peerage Page|accessdate=2008-07-17] He was the third son of the wealthy industrialist John Marshall who introduced major innovations in flax spinning and built the celebrated Marshall's Mill and Temple Works in Leeds, West Yorkshire.cite book|last=Gilleghan|first=John|title=Leeds: A to Z of local history|publisher=Kingsway Press|date=2001|pages=166-167|chapter=Marshall, John|isbn=0951919431] His eldest brother William was MP for Beverley,cite web|url=http://www.leighrayment.com/commons/Bcommons3.htm|title=House of Commons constituencies beginnng with "B": Beverley|work=Leigh Rayment's Peerage Page|accessdate=2008-07-17] Carlislecite web|url=http://www.leighrayment.com/commons/Ccommons2.htm|title=House of Commons constituencies beginnng with "C": Carlisle (Cumberland)|work=Leigh Rayment's Peerage Page|accessdate=2008-07-17] and East Cumberlandcite web|url=http://www.leighrayment.com/commons/Ccommons6.htm|title=House of Commons constituencies beginnng with "C": Cumberland East|work=Leigh Rayment's Peerage Page|accessdate=2008-07-17] and his next eldest brother, John, was an earlier MP for Leeds. The fourth brother, Henry Cowper, was Mayor of Leeds in 1842-1843.

Marshall bought the Monk Coniston estate, near Coniston, Cumbria, from the Knott family in 1835.cite web|url=http://www.nationaltrust.org.uk/main/w-vh/w-visits/w-findaplace/w-conistontarnhows/w-coniston_tarnhows-history.htm|title=Coniston and Tarn Hows: a brief history|work=National Trust|accessdate=2008-07-17] He later created the celebrated landscape of Tarn Hows by constructing a dam to merge three existing small tarns into the present body of water, at the same time supplying water power to his sawmill in Yewdale. [cite web|url=http://landscape-images.co.uk/tarnhows.htm|title=Tarn Hows - Lake District|work=Landscape Images|accessdate=2008-07-17] The estate was later bought by Beatrix Potter and eventually passed to the National Trust.

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