himself erred, and, from the circumstance that Abilene, even in recent times, was called, after the last ruler of the former dynasty, ἡ Λυσανίου, drew the inference that a monarch of that name was still existing; while, in fact, Abilene either belonged to Philip, or was immediately subject to the Romans. [524] The above chronological notation relates directly to John the Baptist alone; a similar one is wanting when Luke begins farther on (v. 21 ff.) to speak of Jesus. Of him it is merely said that he was about thirty years of age, ὡσεὶ ἐτῶν τριάκοντα, on his public appearance (ἀρχόμενος), but no date is given; while, in the case of John, there is a contrary omission. Thus even if John commenced his ministry in the 15th year of Tiberius, we cannot thence gather anything as to the time when Jesus commenced his, as it is nowhere said how long John had been baptizing when Jesus came to him on the Jordan; while, on the other hand, although we know that Jesus, at his baptism, was about 30 years old, this does not help us to ascertain the age of John when he entered on his ministry as Baptist. Remembering, however, Luke i. 26, according to which John was just half a year older than Jesus, and calling to our aid the fact that Jewish usage would scarcely permit the exercise of public functions before the thirtieth year, we might infer that the Baptist could only have appeared half a year before the arrival of Jesus on the banks of the Jordan, since he would only so much earlier have attained the requisite age. But no express law forbade a public appearance previous to the thirtieth year; and it has been justly questioned whether we can apply to the freer office of a Prophet a restriction which concerned the Priests and Levites, for whom the thirtieth year was fixed for their entrance on regular service [525] (Num. iv. 3, 47. Compare besides 2 Chron. xxxi. 17, where the 20th year is named). This then would not hinder us from placing the appearance of John considerably prior to that of Jesus, even presupposing the averred relation between their ages. Hardly, however, could this be the intention of the Evangelist. For to ascertain so carefully the date of the Forerunner’s appearance, and leave that of the Messiah himself undetermined, would be too great an oversight, [526] and we cannot but suppose that his design, in the particulars he gives concerning John, was to fix the time for the appearance of Jesus. To agree with this purpose, he must have understood that Jesus came to the banks of the Jordan and began to teach, shortly after the appearance of John. [527] For that the above chronological determination was originally merely the introduction to a document concerning John, quoted by Luke, is improbable, since its exactness corresponds with the style of him who had perfect understanding of all things from the very first, παρηκολουθηκότι ἄνωθεν πᾶσιν ἀκριβῶς, and who sought to determine, in like manner, the epoch of the Messiah’s birth.