[Drawing didn't always come easy.] He struggled with black and white, ... But when he got to Arles in 1888, he discovered the reed pen, and it was then he developed a more comfortable relationship with his tool. As reed wears down, it becomes softer, more flexible and responsive to his gestures on paper.

Drawings have always been the P.S. part of van Gogh's work, ... Yet he was a letter writer, a guy with a pen in his hand.

He struggled with black and white. But when he got to Arles in 1888, he discovered the reed pen, and it was then he developed a more comfortable relationship with his tool. As reed wears down, it becomes softer, more flexible and responsive to his gestures on paper.