William Alexandra Tyzack (1836-1889) was the only son of Ebenezer Tyzack (1806-1867). He joined his father's firm (Tyzack, Sons & Turner) at Rockingham Street as a traveller. After Ebenezer's death in 1867, William established his own venture with Joseph Sibray. It was based at Stella Works, Hereford Street, and the original workforce was apparently about twenty.

Contemporary accounts described an integrated steel and tool factory. In 1873, Tyzack had built a 12-hole crucible furnace. The firm specialised in 'Crown' (hand­forged) and 'Patent' (machine 'filed') scythes. In 1874, a steam hammer had been introduced to speed up forging, but until a competent operator was found Tyzack's men 'threw every possible obstacle in the way of work being satisfactorily performed by it'(Implement & Machinery Review, l June 1879). Saws and hand-cut files were also manufactured. Wil­liam's liking for country life led to an interest in agricultural machinery, particularly for reaping machines. He loved horses, hence his 'HORSEMAN' brand (after 1891, the firm also used the 'WAT' mark). Export markets included Australasia, Canada, and South America - and later Russia. 

In about 1877, Sibray retired. Tyzack took as partner his manager, James Havenhand. By the end of the 1880s, his managers included J. W. Gould and his sons, William (1863-1925), Ebenezer Bernard (1870-1902), and John Stanley (1877-1941). When Gould retired, two further employees- W. H. Havenhand (the son of James) and J. H. Habbijam - were recruited. William died on 22 December 1889 (aged 53) from 'internal disorders'. He was a Town Councillor, Conservative, and attended Sharrow Church (Sheffield Independent, 24 December 1889). He was buried in the family vault in Ecclesall, leaving £52,440.

His son, Bernard, succeeded him. He died on 2 July 1902, aged 32. He had been a 'well-known figure in the hunting field' (Sheffield Daily Telegraph, 3 July 1902). He was buried in Ecclesall leaving £17,724. William, of Ryecroft, Dore, retired soon afterwards (he died on the Isle of Man, leaving £30,452). John S. Tyzack became the head of the business. Like his father, he had the 'same forthrightness of character and the same love for country life and horses in particular ... although [he was] not fond of travel' (Sheffield Telegraph, 25 May 1950). Besides developing the file, scythe, and reaper sections business, he took the firm into high-speed steel manufacture before the First World War. 'Super' Horseman high-speed steel turning tools for 'heavy cutting and drilling' took prominence in an advertisement after the war (Wilson & Twigg, 1919)¹. 

In 1934, J. S. Tyzack took as partner his nephew, William Alexander Tyzack (1895-1979) - the son of William. In 1937, the firm became 'Ltd', with John S. Tyzack as chairman, and with his son Donald Stanley Tyzack (1913-1992) and W. Alec Tyzack as directors. When J. S. Tyzack died at Carlton, Nottinghamshire, on 15 November 1941, aged 64, he was recalled as 'one of the old type of Sheffield industrialist who personally controlled his old-established and privately-owned firm. He knew the men who worked with him, many of them having been in his employ for long periods' (Sheffield Daily Telegraph, 20 November 1941). The business had made him wealthy: he left £101,833. Donald succeeded him as chairman and governing director, with W. Alec as joint managing-director, and William Johnson, Col. George Vivian Hunt and Bernard Tyzack as directors.

Between 1947 and 1949, Tyzack's acquired Ibbotson Bros part of its Globe Steel Works Alma Street and Green Lane, which contained a lete file manufacturing plant. Tyzack's also acquired the 'IBBOTSON' and 'GLOBE' marks for use on files. The factory was renamed Horseman Works and re-equipped to handle the expanding business in parts for agricultural machinery (Sheffield Telegraph, 25 May 1950). The main offices remained at Stella Works. In 1949, capital was increased to £200,000. After a decade of prosperity, in 1960 Tyzack's became a public company with £½m capital (£382,000 paid up) and with Donald S. Tyzack as chairman. The workforce topped 400. Profits remained buoyant in the 1960s, when the company diversified into components for motor vehicles. In 1986, Tyzack's acquired machine knife makers A. R. Heathcote. In 1988, it bought for £2.5m the business ofTyzack Sons & Turner. About 200 workers from Little London Works were transferred to Green Lane. But a boardroom coup led by Bill Eastwood, followed by an abortive takeover by GSM plc, led to the fragmentation of Tyzack's. Im 19889, Eastwood founded Eurovein, after paying £13.5m for his former company's machine-knife interests (which he continued as Tyzack Machine Knives). In 1995, he bought FBT (Shears) from Firth Brown Tools. Tyzack Machine Knives was later sold to a firm linked to Turton Bros & Matthews. In 1989, an Austrian firm, Miba, acquired Tyzack's business in clutch and brake transmission components. Miba Tyzack Ltd continued to operate at Green Lane until 2004, when it told its 150 workers that it planned to vacate the site. By 2007, Miba had transferred manufacturing to Slovakia. In that year, the Sheffield Flood swamped Horseman Works. It became the site of a redevelopment plan: 'Little Kelham'. 

¹Wilson, R. T. and Twigg, E. J., Industrial Sheffield and Rotherham (Sheffield, 1919)