I went tonight to a conversation between Mat Collishaw and Lisa Seitz, the editor-in-chief of Weltkunst and author of a book about Werner Muensterberger, a German psychoanalyst based in London who studied the psychology of collecting.

I had not realised the extent to which Collishaw is interested in Old Master painting, based on his upbringing as a Dawn Christadelphian, starved of the experience of any imagery, including television. He spoke particularly well of his experience of the Major Oak, a tree in Sherwood Forest which is the subject of Albion, one of the biggest and most ambitious works in his current exhibition:-