Representation of the Roman poisoner Locust trying at the side of Emperor Nero (37-68) a poison intended for his brother Britannicus (41-55) on one of his slaves, 55 Engraving after a painting by Joseph-Noel Sylvestre (1847-1926) 1876 (Roman poisoner Locust (or Lucusta) hired by his Emperor Nero to kill brother Britannicus tries a poison on a slave, 55 AD - Engraving after a painting by Joseph Noel Sylvestre, 1876) Private collection