2 Kings 22:3

And it came to pass in the eighteenth year The Chronicler gives two dates anterior to this for events in the course of Josiah's life. He says (2 Chronicles 34:3-7 R.V.) -In the eighth year of his reign while he was yet young, he began to seek after the God of David his father, and in the twelfth year he began to purge Judah and Jerusalem from the high places, and the Asherim, and the graven images and the molten images. And they brake down the altars of the Baalim in his presence, and the sun-images that were on high above them he hewed down, and the Asherim and the graven images and the molten images he brake in pieces, and made dust of them and strewed it upon the graves of them that had sacrificed unto them. And he burnt the bones of the priests upon their altars and purged Judah and Jerusalem. And so did hein the cities of Manasseh and Ephraim and Simeon, even unto Naphtali, in their ruins round about. And he brake down the altars and beat the Asherim and the graven images into powder, and hewed down all the sun-images throughout all the land of Israel, and returned to Jerusalem". It is clear that we have here, a most comprehensive summary of the destruction of idolatry in the whole of Josiah's reign and not what he began to do in his twelfth year. The Chronicler however having given us the date at which Josiah first manifested his disposition to destroy the idols out of the land, includes in the same sentences all that was done by the king in the after part of his reign. We cannot but think that the chief impulse toward the utter destruction of the idols was given, as the writer of Kings tells us (2 Kings 23:3) when the king made a covenant to walk after the Lord, according to the words of the book of the Law, and all the people stood to the covenant. Then began the extermination of all remaining traces of idolatry, which the king himself had begun to remove in some degree in his twelfth year.

The LXX. adds to the date given in this verse, ἐν τῷ μηνὶ τῷ ὀγδόῳ, -in the eighth month", but with no warrant from the original.

the king sent Shaphan … the scribe The event on which all else in Josiah's reformation seems to hinge is the restoration of the temple. There it was that the book of the Law was discovered which stirred both king and people to attempt a thorough reformation. Therefore the writer of Kings passes to that undertaking without pausing over minor matters which preceded it.

Shaphan … the scribe Shaphan whose father and grandfather are here mentioned, was the father of Ahikam mentioned below (verse 12) and of Gemariah (Jeremiah 36:10-12), and the grandfather of Gedaliah (Jeremiah 39:14; Jeremiah 40:5; Jeremiah 40:9; Jeremiah 40:11, &c.). The office of Scribe in his time was clearly an important one. He is sent by the king to take oversight of the funds for the restoration of the temple, and seems to have ranked with the governor of the city and the recorder. We have no notice of Shaphan's afterlife. He must have been advanced in years at this time, for thirty-five years after this date his grandson Gedaliah was set by the Chaldæans to be governor of the country.