From this small passage one can barely notice one of the characteristics of an autobiography. The main characteristics of an autobiography are:
1.- Order your story in a Chronological order
2.- Speak in the First Person
3.- Define well all the characters involved in your life
4.- Explain in good detail the setting of your "life-story"
5- give plenty of details about the most transcendent things
In the passage from Narrative of the Life of Frederick Douglass:
I was born in Tuckahoe, near Hillsborough, and about twelve miles from Easton, in Talbot county, Maryland.
The only present element of an Autobiography is:
The recording of events in chronological order
Although we only have one element, it belongs to the category.