The obscure villages of the inland country are irrecoverably lost; nor can we name the field of battle where Julian fell: but M. d'Anville has demonstrated the precise situation of Sumere, Carche, and Dura, along the banks of the Tigris (Geographie Ancienne, tom. ii. p. 248; l'Euphrate et le Tigre, p. 95, 97). In the ninth century, Sumere, or Samara, became, with a slight change of name, the royal residence of the khalifs of the house of Abbas.