Author: Who authored the piece? What do you know about the author that
would affect the reliability of the document? Are you aware of any bias the
author might possess that would color the account?
Place: Where was the source produced? Why there?
Time: When was this source produced? Under what circumstances?
Audience: Who was the source created for? How might this affect the
reliability of the document?
Reason: Why was this source produced? What was the intention of the
author(s) in creating it?