Motive
What is the source? What is its purpose? Why was it made?
Audience?
Who is the intended audience?
Content
What is the source? What evidence (information) does it give?
Perspective
What was the context of the composer? It it one-sided? What does it tells historians about the life, beliefs, attitudes of the time?
Reliability
Do it show bias? It is subjective or objective? It is complete or incomplete?
Usefulness
How can historians use it to learn about the past?
Origin
Who made the source?
When and where was it made?