John Towlerton Leather

As engineer to the Sheffield Waterworks Company he helped create the Redmires Reservoirs and the Crooke's Moore Reservoirs, during which time the young John Fowler trained under him.^[2]

In 1839 he entered into partnership with Mr Waring (later of Waring Brothers) as contractors - they were involved in construction of parts of the Midland Railway (Chesterfield) and London and North Western Railway (Chester and Crewe). The partnership with Waring ended and Leather undertook the construction (c.1846-9) of the Tadcaster to York section of the York and North Midland Railway's York to Leeds line, the construction of which was abandoned before it was completed. Between 1847 and 1850 he carried out the Erewash Valley Line. In the mid 1850s he was contracted to carry out improvements to the River Nene, which were also abandoned.^[3] In 1849 he was awarded the contract for the construction of the breakwater at Portland Harbour.^[4]

J. T. Leather was also involved in coalmining enterprises. In 1843 he invested £3500 to join in a new partnership with Kirkby Fenton to run his existing Waterloo colliery at Temple Newsam near Leeds and he came to live at Leventhorpe Hall which had recently been vacated by Fenton. Leather withdrew from the partnership in 1851 and shortly after opened his own colliery nearby, calling it Waterloo Main.^[5]

He was also involved in difficult work on the foundations of the Ness Suspension Bridge in the 1850s,^[3] and repair work to the Middle Level Navigations in the 1860s under John Hawkshaw.^[6]

In 1864 the Dale Dyke Dam, the construction of which he had been supervising, collapsed, causing the Great Sheffield Flood which killed over 200 people. Expert opinion at the time differed over the causes of the collapse. The jury at the inquest into the disaster stated that sufficient care had not been taken in the construction of the works.^[7][8][9]

In 1864 he established the Hunslet Engine Company, a locomotive manufacture, in Leeds on part of the site of the former Railway Foundry. The company was sold to James Campbell in 1871 for £25,000.^[10]

He was employed by the War Office in the 1860s, for the construction of the sea forts at Spithead, as well as Fort Gilkicker and St Helens Fort. In 1867 he was contracted together with George Smith to construct an extension of the Portsmouth Dockyard, which was completed 1877.^[11]

In 1877 he retired from the contracting and civil engineering business. He was High Sheriff of Northumberland in 1875.^[12]

Married twice, he died in Leeds on 6 June 1885.^[12]

• "Obituary. John Towlerton Leather, 1804-1885". Minutes of the Proceedings (obituary). 83 (1886). Institute of Civil Engineers: 433–436. 1886. doi:10.1680/imotp.1886.21451.
• "Memoirs". Proceedings of the Institution of Mechanical Engineers. 37: 261–266. 1886. doi:10.1243/PIME_PROC_1886_037_018_02.