"Whistler [at the Paris Impressionism-exhibition, of M. Petit, May 1887] has some very fine bits of sketches in paint, forty-two!! He was honored with the best places, he also has a large portrait of a lady, the painting is completely black. Nor is there any luminosity either. Whistler, by the way, does not care for luminosity. His little sketches show fine draftsmanship. In the corridor he has some very good, in fact, quite superior etchings, they are even luminous, which is strange for an artist who does not aim at this in his color."