1.          1. Written Records: Books, diaries, official documents, decrees, and judgments.

      2.          2. Oral Traditions: Stories, poems, and proverbs passed down verbally.

      3.          3. Archaeological Remains: Ruins, forts, inscriptions, ancient weapons, coins, and artifacts.

Utilizing these sources requires exceptional intelligence, effort, passion, and insight, as well as knowledge of a nation’s customs, habits, and geography.