“And do you know how Vincent produced his half-a-dozen almost identical versions of the mother with a cradle, or, for that matter, all those similarly angelic sunflowers? He used tracing paper. Van Gogh was a demon tracer. I laughed when I made this discovery. Van Gogh scholars have twisted themselves into chronological knots trying to work out how Vincent managed to paint sunflowers in October, or January, as he did, when they bloom only in high summer. He traced them from his earlier pictures.”
[Waldemar Januszczak]