Sargent: Portraits of Artists and Friends, National Portrait Gallery, May 2015 Madame Ramon Subercaseaux sits tilted back away from the piano on whose keys rests her right hand.  Her tilted form creates a diagonal with her head to the right and her train to the left under the keyboard.  A colour contrast forms the other … Continue reading Sargent: Portraits of Artists and Friends, National Portrait Gallery, London, reviewed by Ian Pople