"It is absolutely necessary, while what I saw yesterday at Miss Cassatt's is still fresh in mind, to tell you [Lucien, his son] about the colored engravings she is to show at Durand-Ruel's at the same time as I. We open Saturday.. .You remember the effects you strove for at Eragny? Well, Miss Cassatt has realized just such effects, and admirably: the tone even, subtle, delicate, without stains on seams: adorable blues, fresh rose, etc."