 She exhibited over 70 miniature portraits, mainly of women or children, at the Royal Academy.She painted widely for aristocratic families, but is perhaps best known for her portraits of Lady Elizabeth Bowes-Lyon.In 1905, Lady Cecilia Bowes-Lyon, Countess of Strathmore and Kinghorne commissioned a watercolour miniature portrait of her daughter, Lady Elizabeth Bowes-Lyon, later Queen Elizabeth the Queen Mother, which Hankey exhibited at the Royal Academy and is now in the Royal Collection.