I think the themes will be developed because its stating the facts thats really determined times on their children and how they would grow up but what we need is a whole lot of information to describe more of the short paragraphs
The poem "Swift Things are Beautiful" by Elizabeth Coatsworth is about how everything around us is fleeting and ephemeral, and quickly goes by while we are not even looking. She wants to say that even though they disappear quickly, these sights are nevertheless beautiful. The point is that we should look around us and admire the view, and enjoy the beauty of it all while it is still there, because it will be gone soon. We should cherish these fleeting moments because we may not get the chance to do that ever again.
I believe the answer would be that Douglass is forced to do field work during all daylight hours. Covey is a treacherous master who has the reputation of breaking slaves who are disobedient. Douglass is never given a moments rest.
I hope this answer has helped you, and my deepest apologies if this answer is incorrect.