(until 20 May 2018 at the National Portrait Gallery, London)
Shouldering up against the wall, the girl turns her face away from the light. We catch her in an unguarded moment, her blouse slipping off her shoulder and her hair mussed, her fingers tangling in her necklace. This is the celebrated actress Ellen Terry at the age of seventeen, photographed by Julia Margaret Cameron during her brief, ill-suited marriage to the much older painter George Frederick Watts. It isn’t a portrait but an allegory, titled Sadness, and Cameron gives us the impression of trespassing on something deeply personal. It’s one of the most arresting images from a clutch of wonderful mid-Victorian photographs currently on view at the National Portrait Gallery, tracing the early days of this art form through the works of four pioneers: Cameron herself; her teacher Oscar Rejlander; Lewis Carroll; and the ‘amateur’ artist Lady Clementine Hawarden.