Comparing Frederick Douglass 'Pathos, Egos, And Logos'

Frederick Douglass uses many rhetorical devices to convince the reader that slavery should be abolished, by implying that blacks are equal to whites, while appealing to Ethos, Pathos, and Logos.
Douglass starts off by telling where he was born but going on to explain of how he does not know the year of his birth so therefore: is unaware of his birthdate, he also explains that most slaves do not know basic information such as birthdays, names, or even the names of their parents. This is the first point in the book where he appeals to Egos and also Pathos because he is a credible source considering he is telling the information in a first person point of view and pulling emotion from the reader because the slaves are unaware of common knowledge.