This isn't a question at least I don't think it is
It's "my feelings were not the result of any marked cruelty in the treatment I received; they sprung from the consideration of my being a slave at all. (I believe this is correct cause he thought he was a slave himself. And obviously didnt like it
Just write about what you read in the thing
A preposition is a word or group of words used before a noun, pronoun, or noun phrase to show direction, time, place, location, spatial relationships, or to introduce an object. Prepositions connect words together into what is called a prepositional phrase.