Much like a crime scene investigators, historians collect and analyze evidence in order to make sound judgements about the past. The evidence is called a primary source. After we collect all the evidence we then write our history; that is called a secondary source. Historians also must engage in a dialogue with other historians/writers to distinguish the difference between their work and what was previously written about the subject. This is also captured in the secondary source. We will be working with primary sources in most modules, so this assignment will be the foundation on which your future success will rest.