13. aliquā ＝ ūllā.
cōnfūsum: ‘confused’; modifies annum and is modified by prius.
14. morbō: i.e. a natural death as contrasted with a death by violence.
Ch. 4.
16. huic successit: lit. ‘to this one succeeded’ ＝ ‘his successor was’; note the emphasis.
hīc bella reparāvit: in allusion to the former activity of Romulus in that direction.
17. Albānōs: Alba Longa, the most ancient town in Latium, is said to have been built by Ascanius, and to have colonized Rome. After its destruction by Tullus Hostilius it was never rebuilt. Its inhabitants were removed to Rome. At a later time the surrounding country was studded with the splendid villas of the Roman aristocracy. Livy, Bk. I, XXII-XXV, gives an account of the conquest of the Albans.
mīliāriō: the Roman milestones were set up at intervals of 1000 paces, 5000 Roman feet, on the military roads. They gave the distance from the place from which the measurement was made, its name, the name of the person who erected the stone, and the name of the reigning emperor. The phrase means ‘twelve miles from Rome.’
18. aliī … aliī: ‘the one … the other.’ Eutropius uses alius with the meaning of alter.
20. adiectō Caeliō monte: lit. ‘the Caelian Hill having been annexed’ ＝ ‘by annexing the Caelian Hill’; cf. conditā cīvitāte, Ch. 2.