What is the time period and place in which the work is set in Learning to Read and Write by Frederick Douglass?

Douglass's
best guess is that he was born in or around 1818, based on his master telling him in "some
time during 1835, [that he] was about seventeen years old." He "was probably between
seven and eight years old when [he] left Colonel Lloyd's plantation" to "live with
Mr....