Daniel replies:

Here's the thing about research: You try to get all the facts as accurately as you can--but seldom, if ever, does anyone get everything just right. So mistakes appear in the record, and the next researcher picks up and repeats some of them up--knows better, and corrects other mistakes--and makes new mistakes, which become part of the record. So, now you are learning something really valuable about history. I don't want to be the one to spoil it for you. You may use this statement as part of your project.