Im going to assume its because a "lame duck" session only happened when congress meets after a election.
So lets say that you pick 300 then you add 10 and you would get 310
I'm not sure but here are some things europeans take from Africa and I hope this counts
Africans were either captured in warning raids or kidnapped and taken to the port by African slave traders. There they were exchanged for iron, guns, gunpowder, mirrors, knives, cloth, and beads brought by boat from Europe. When Europeans arrived along the West African coast, slavery already existed on the continent.
