J.M.W. Turner: Sketchbooks, Drawings, Watercolours | Tate https://www.tate.org.uk/about-us/projects/jmw-turner-sketchbooks-drawings-watercolours
A major research project aiming to provide detailed catalogue entries for over 37,000 works on paper by J.M.W. Turner in Tate’s collection.
terms of five periods: 1778–1801 Student and master 1802–1818 Academician and professor