Thomas Helliker, a shearman's apprentice, became one of the martyrs of the Industrial Revolution in 1803 when he was hanged at Fisherton Jail Salisbury. Nevertheless, at one point in 1820 Trowbridge's scale of production was such it was described as the "Manchester of the West". It had over 20 woollen cloth producing factories, making it comparable to Northern industrial towns such as Rochdale. The woollen cloth industry declined in the late 19th century with the advent of ring-spinning and this decline continued throughout the 20th century. However, Trowbridge's West of England cloth maintained a reputation for excellent quality until the end. The last mill, Salter's Home Mill, closed in 1982 and is now the home of Boswell's Café and Trowbridge Museum and Art Gallery, integrated into the Shires Shopping Centre. The museum portrays the history of woollen cloth production in the town; the displays include an extremely rare Spinning Jenny, one of only five remaining worldwide. There are also working looms on display. Clark's Mill is now home to offices and the County Court; straddling the nearby River Biss is the "Handle House", formerly used for drying and storage of teazles used to raise the nap of cloth. This is one of very few such buildings still known to exist in the United Kingdom. In its place a bedding industry developed, initially using wool cast off from the mills; the company now known as Airsprung Furniture Group was started in the town in the 1870s. Food production also developed in the town when Abraham Bowyer started his business in 1805 which eventually, as Pork Farms Bowyers, became one of the largest employers in the town until closure in April 2008 when production moved to the Shaftesbury and Nottingham factories. The town became the county town of Wiltshire in 1889 when Wiltshire County Council was formed and sought a place which representatives from Swindon and Salisbury, among others, could reach and return home from in one day. Trowbridge fulfilled this criterion by virtue of its railway connections and thus was chosen as the county town, further reinforced by the construction of the county hall in 1939. The brewing company Ushers of Trowbridge opened in 1824, and developed the brewery in the town. This was finally shut in 2000 following several changes of ownership and its equipment was sold to North Korea, where it forms the core of the Taedonggang brewery, just outside Pyongyang. Food production continues in the town through companies such as frozen food processor Apetito.