...In an exhibition at the Society of Illustrators, illustrator Peter de Sève includes working drawings that reveal the thought processes of the artist: Preliminary sketches that reveal the original spark of inspiration before the concept has been refined and diminished.
[This] work by Arthur Rackham reveals the artist's underlying sensitive pencil lines.
De Sève writes, "It's thrilling for me to see the half-erased pencil lines that reveal clues to the artist's thinking process and detours he or she traveled to get to the final artwork."
[http://illustrationart.blogspot.nl/2018/02/the-collectors-eye-peter-de-seve.html]