Thomas Jones (1742 – 1803) was a Welsh landscape painter and was best known in his lifetime as a painter of Welsh and Italian landscapes. Jones' reputation grew in the 20th century when some unconventional works of his, not intended for public consumption, came to light. Most notable among these is a series of views of Naples which he painted from 1782 to 1783. He broke with the conventions of classical landscape painting in favor of direct observation. His view of the view of the San Martino hill in Naples is very unusual for its time. His autobiography, Memoirs of Thomas Jones of Penkerrig, went unpublished until 1951 but is now recognized as an important source of information on the art world of the 18th-century.
[See this link to the website of Napoli Underground for a further discussion of Thomas Jones in Naples.]