Dictionary of Greek and Roman Geography (1854) (ed. William Smith, LLD) alphabetic letter D Apollonius Rhodius (Arg. i. 947) doubtless followed an old tradition when he described the Doliones as occupying the isthmus, by which he means the isthmus of Cyzicus, and the plain, which is probably the plain on the mainland; and here, he says, reigned Cyzicus, a son of Aeneas. (21.77)