2. roll of a book—a book formed of prepared skins made into a roll. Compare "volume of the book," that is, the Pentateuch (Ps 40:7). It does not follow that his prophecies were not before committed to writing; what is implied is, they were now written together in one volume, so as to be read continuously to the Jews in the temple.
against … nations—(Jer 25:15, &c.).
from … days of Josiah—(Jer 25:3). From Josiah's thirteenth year (Jer 1:2).