Apart from these, all that is known of David comes from the biblical literature. Some scholars have concluded that this was likely compiled from contemporary records of the 11th and 10th centuries BCE, but that there is no clear historical basis for determining the exact date of compilation. Other scholars believe that the Books of Samuel were substantially composed during the time of King Josiah at the end of the 7th century BCE, extended during the Babylonian exile (6th century BCE), and substantially complete by about 550 BCE. Old Testament scholar Graeme Auld contends that further editing was done even after then—the silver quarter-shekel which Saul's servant offers to Samuel in "almost certainly fixes the date of the story in the Persian or Hellenistic period" because a quarter-shekel was known to exist in Hasmonean times. The authors and editors of Samuel drew on many earlier sources, including, for their history of David, the "history of David's rise" (), and the "succession narrative" ( and ). The Book of Chronicles, which tells the story from a different point of view, was probably composed in the period 350–300 BCE, and uses Samuel and Kings as its source.