Since 1959, Paintings in Hospitals have lent artwork to health-care institutions in order to brighten up depressing corridors and wards and lift the spirits of the patients and staff who inhabit these spaces. The charity's fourth-annual summer exhibition focuses on art's medicinal power, exploring whether access to visual stimulation speeds recovery. Featured works include Julie Cockburn's whimsical drawings of birds on maps and John D Edwards' painted responses to cancer.