When Christabel Blackman's mother turned ninety, they celebrated by sifting through Barbara's old documents: diaries, photos, manuscripts - and a fragile old folder, tied with a ribbon.

This held letters from a love long past between Christabel's parents. It was a portal into a decade of art and love between Charles and Barbara Blackman.

With over 160 artworks from Charles Blackman, as well as never-before-seen sketches, letters, documents and photos, it is a beautiful and revealing portrait of two people, their art, and a world they changed forever.