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Kitson and Company was a locomotive manufacturer of Airedale Foundry and Monkbridge Iron Works, of Leeds.
1871 Employing 900 men 
1876 Members of the Iron and Steel Institute visited their engineering works. Kitson and Co 
1877 James's son, James Kitson (1835-1911), assisted his father in managing the engineering factory at Hunslet
From 1876 to 1901 the company built a number of steam tramcars, along with a few rail-motor units
1886 The co-partnery was converted into a limited liability company; Lord Airedale continued to take an active part in its management. In addition to building locomotives they established other branches of business, notably stationary engines for rolling mills and blowing engines
By 1889 they were building 4-6-0s for South America.
Another innovation was the articulated locomotive design proposed by Robert Stirling based on the Meyer locomotive, later known as the Kitson-Meyer. The first three were built in 1894 for the Anglo-Chilean Nitrate and Railway Company in Chile, with two in 1903 for Rhodesia and three in 1904 for Jamaica. Over fifty were built, some 2-8-8-0 and 2-8-8-2, the last being in 1935. There were also some 0-8-6-0's designed for rack railway working in the Andes.
1911 Manufacturer of Locomotives for the Railways.
1914 Listed as locomotive and general engineers. 
After a busy period during World War I trade dropped off in the 1920's During this period an experimental Steam diesel hybrid locomotive 2-6-2T design, combining steam power with internal combustion, was tested on the London and North Eastern Railway between York and Hull. This hauled revenue-earning trains for the LNER but Kitson's could not afford to develop this experimental locomotive into a commercially viable form. The Kitson-Still's high research and development costs contributed to Kitson's demise.
1924 The last large order in 1924 was for twelve London and North Eastern Railway Improved Director class locomotives.
1927 See Aberconway for information on the company and its history
In 1934 the receivers were called in. The company had built around 5,405 locomotives
1938 The company struggled on until 1938
The patterns, drawings and good will were acquired by Robert Stephenson and Hawthorns.
From 'Short Histories of Famous Firms' by Ernest Leopold Ahrons, The Engineer - 1923/11/23.
"After the retirement of Mr. Thompson in 1858, the name of tho firm was simplified to Kitson and Hewitson, and continued in that form until 1863, when Mr. Hewitson died and the whole of the interests were taken over in 1865 by the Kitson family. The firm then became Kitson and Co, by which title it has since been known. Mr James Kitson was then joined in partnership by his two sons, Mr James Kitson, junior, and Mr John Hawthorn Kitson. The first named was subsequently better known as Sir James Kitson, Bart., and in 1908 was created a peer with the title of Lord Airedale..." Read more.