why are some narrative of slave consider bias by historian?

3 answers

Because most historians back then were white (because blacks werent allowed to go to school). This left many biast things about the slave system and slave trade.
does anyone can provide me a website for this issue? i cannnot find them when search with google.
Not all of these, but some address bias in slave narratives:
http://www.google.com/search?q=%22slave+narratives%22+biased&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

Remember -- each of us tells a story from our own points of view. Each person's point of view is his or her bias.