Stephen W Williams or Stephen Williams (1837–1899) was a civil engineer and architect who worked mainly in Radnorshire and Breconshire, Wales.^[1] He was county surveyor of Radnorshire from 1864 to 1899. He had offices at Rhayader and lived at Penralley House, Rhayader,^[2] He became a noted authority on the archaeology of the Cistercian Monasteries in Wales and undertook excavations at Strata Florida Abbey in Ceredigion, Abbey Cwm Hir in Radnorshire and Strata Marcella near Welshpool in Montgomeryshire. He was appointed High Sheriff of Radnorshire in 1899.^[3]

He was originally articled in 1852 to Samuel Bate of Trent Vale from November 1852 for five years. He was then employed as an engineer by a Mr Atkinson who was a sub-contractor to Benjamin Piercy and between 1858 and 1861 he was an engineer on the Vale of Clwyd Railway.^[4] He also worked as an assistant engineer on the Oswestry and Newtown Railway. It is suggested by Scourfield that Williams may have been responsible for the design of Welshpool railway station, which was completed in 1862.^[5]

In March 1861 he set up his own architectural practice in Rhayader. At this period he continued to undertake railway survey work in Wales and in parts of England^[6] In 1864 he was appointed county surveyor for Radnorshire. He was elected a FRIBA in 1886 and a Fellow of the Society of Antiquaries of London (FSA) in 1890. He became company secretary and Surveyor for the Llandrindod Estate and Building Company.^[7][8] He was a man of wide interests and joined the 1st Herefordshire Rifle Volunteers in 1878. He set up the Rhayader Company of the Volunteers, with the rank of Captain and eventually he became Lieutenant Colonel in command of the entire battalion. In 1899 (the year of his death) he was the High Sheriff of Radnorshire.

Williams supplemented his salary of £100 a year as Radnorshire county surveyor by undertaking work as a land surveyor and estate agent. This included work on enclosure awards. One of the largest awards was the '’Swydd Neithon'’, which enclosed the Llandrindod and Cefnllys commons and made available the land on which the new town of Llandrindod Wells was to be built.^[9] The contacts he made led to further work as a surveyor and agent with local estates. He surveyed the Gogerddan and Rhydoldog estates and was the agent for the Llysdinam estate where Francis Kilvert was a regular guest.

In 1892 the Birmingham Corporation Water Act was passed which gave the Birmingham City Council powers to compulsorily purchase land in the Elan Valley close to Rhayader, for the construction of dams for a water supply for the city. Birmingham Corporation had appointed the engineer, James Mansergh, to oversee the project but he needed someone to plan and build the workers' village.^[10] In October 1892 Williams was requested to value various estates by the Birmingham Town Clerk and in May 1893 he was appointed Elan Valley Estate Agent by the City Council.^[11] This involved the management of 45,000 acres of land and he was also involved in the delicate negotiations over land leases, dealing fairly and discreetly with local tenants, many of whom lost their lands as a result of building the reservoirs. In these matters he was to work closely with James Mansergh, who referred to him as 'our ubiquitous friend'^[12]

A major scheme in which Williams was involved was the planning and laying out of Llandrindod after the '’Swydd Neithon'’ was enclosed in 1862. The development and layout of the town then proceeded in two parts. Lands owned by Richard Green Price was surveyed and laid out by Williams around Rock park, while the Pump House Estate to the east was laid out by Thomas Nicholson.^[13] Apart from William's designs for shops and houses, his work also included;

• Town Hall, Temple Street^[14]
• Station Crescent Terrace^[15]
• Market Hall (later destroyed by fire)^[16]
• Hotel Commodore. Originally built as the Rectory for Archdeacon de Winton in 1882–4. Multi-gabled and tile hung. Converted to a hotel in 1896^[17]

William's attended his first meeting of the Cambrian Archaeological Association at Welshpool in 1857 at the age of 20. He had fairly diverse interests which included Numismatics, arms and armour, the study of monumental effigies in churches and he contributed an article about Roman finds at Kenchester in Herefordshire.^[18] Shortly before his death in 1899, Williams, as High Sheriff of Radnorshire, was instrumental in holding a groundbreaking treasure trove proceedings on the hoard of late Iron Age or Roman gold bracelets and a ring that were found at Carreg Gwynion, Nantmel near Rhayader. The hoard was declared treasure trove and is now in the collections of the British Museum, but Williams at the time made a plea for the foundation of a National Museum for Wales.,^[19] which could house such discoveries in future.^[20] It was the Cistercian Abbeys of Wales that were to become his main interest and he has been described as the 'father of Cistercian archaeology in Wales'^[21] To assist him with his Excavations he employed his architectural assistant, Telfer Smith^[22] as clerk of Works and Worthington George Smith to act as an architectural draughtsman. Worthington Smith was both a distinguished botanical illustrator and a leading Palaeolithic archaeologist.