See Leo the Deacon, Historiae, Patrologia Graeca, 117, 713; Ibn Hawqal, Configuration de la terre, trans. Johannes H. Kramers and G. Wiet, vol. 1 (Paris: Commission internationale pour la traduction des chefs-d’oeuvre, 1964), p. 194; and Mathews and Daskalakis-Mathews, “Islamic-Style Mansions,” p. 296.