John Leslie Thomson was born in Aberdeen but lived in London for most of his career.
He was a painter of landscape and coastal scenes in oil and watercolour and was greatly influenced by Daugbigny and the painters of the Barbizon School. He studied at Slade and became a member of the English School, rarely returning to Scotland. His subjects were mainly river scenes of England, Brittany and Normandy. He exhibited from 1872 at the Royal Academy, the Society of British Artists, the New Watercolour Society, the Grosvenor Gallery, the New Gallery and elsewhere.
Who Was Who, 1929-1940, London, 1941.; Wood, C., The Dictionary of Victorian Painters, Woodbridge, 1971; Halsby, J. and Harris, P., The Dictionary of Scottish Painters, 1600-1960, Edinburgh and Oxford, 1990