The year 2024 marked the one-hundred-and-fiftieth anniversary of the first Impressionist exhibition. One artist who declined an invi- tation to join Degas, Cézanne, Renoir, Monet and a select group of friends in their revolutionary Paris show in 1874 was James McNeill Whistler. He was then living in London, busily creating atmospheric pictures of Chelsea and the Thames. This lecture looks at Whistler’s work and his influence on four young British artists who in 1889 exhibited together as ‘the London Impressionists,’ Walter Sickert, Philip Wilson Steer, Theodore Roussel and Paul Maitland.