And what’s the deal with art historians who have failed to use primary sources while talking about them? “A modest exhibition of slate paintings will not be the grandest tribute paid to Sidney Nolan in his centenary year. But it is perhaps the most poignant. Australia’s greatest 20th-century artist painted them in the early 1940s while in the early throes of his decade-long affair with Sunday Reed, and living in a decidedly modern menage with Sunday and her husband John.”