Cornelius Varley (1781–1873): A Pioneer of Watercolor and Scientific Observation Cornelius Varley, FRSA (November 21, 1781 – October 2, 1873), was a British watercolor painter and optical instrument-maker whose meticulous craftsmanship combined with an inquisitive spirit established him as one of the foremost artists of his era. Born in Hackney, London—a burgeoning suburb at the time—Varley’s artistic journey began under the tutelage…