(b Trefonnen, nr. Llandrindod, Radnorshire [now Powys], 26 Sept. 1742; d Pencerrig, Radnorshire, 29 Apr. 1803). Welsh landscape painter, a pupil in London of his fellow Welshman Richard Wilson. He painted some ambitious classical landscapes in Wilson's manner, but he is now best known for his remarkably fresh and unaffected oil sketches done in and around Naples and Rome during a period in Italy, 1776–83 (good examples are in the National Museum, Cardiff). They are among the earliest British examples of this kind of open-air sketch and have a directness that looks forward to Corot. In 1789 Jones inherited the family estate at Pencerrig and in later years lived the life of a country gentleman, painting comparatively little.