b. The book is never mentioned by Jesus ben Sirach (Ecclesiasticus; @ 180 b.c.), although he refers to all the other prophets (Isaiah, Jeremiah, Ezekiel, and collectively the Twelve Minor Prophets). But since Daniel was not included in the Prophets or second division of the canon, never having held the prophetic office, there is no reason why Ecclesiasticus should have mentioned him in that connection. Also, Ecclesiasticus fails to mention other ancient authors about whose existence there is no question