Known as Ernest Jackson, he was trained in France at the Julian and Ecole des Beaux-Arts. He became a teacher at the Central School of Arts & Crafts (1902-21) and is fundamental in the development of lithography in Britain. He also taught at the R A Schools 1921-39 and influenced many of the younger artists in the techniques of mono and coloured lithography. Examples of his work are held at the Tate, V&A and British Museum.