Often times, Scripture gives us an internal evidence that helps us pinpoint when a certain book was probably written. One such example is 1 Samuel 9:9, the author deviates from narrating the story to offer his commentary of events: "(Formerly in Israel, when a man went to inquire of God, he said, “Come, let us go to the seer,” for today's “prophet” was formerly called a seer.)" We do not know who wrote 1 Samuel, but it does show us from this text that the time of prophets is a possible guestimate.