From the chamber of Gemariah son of Shaphan the scribe, which was in the upper courtyard at the opening of the New Gate of the house of the LORD, Baruch read from the scroll the words of Jeremiah in the hearing of all the people.
He says that the roll was then read in the Temple, in the chamber of Gemariah, the son of Shaphan the scribe The chambers, as we have before said, were annexed to the court of the priests; for the Levites were the guardians of the Temple; and every priest also, while performing his duty, remained in the Temple.
It should seem that Baruch had been frequently reading out of the book, to all companies that would give him the hearing, before the most solemn reading of it altogether which is here spoken of; for the directions were given about it in the fourth year of Jehoiakim, whereas this was done in the fifth year, Jer 36:9.
Commenting on Jeremiah 36:9-19
Then read Baruch in the book the words of Jeremiah in the house of the Lord,.... The prophecies of Jeremiah he had taken from him in writing on a roll of parchment; these he read in the temple, in a part of it, after described: in the chamber of Gemariah the son of Shaphan the scribe; not a scribe of the law, or an officer...