What does Caleb Copeland answer when his wife says, he knows we are against slavery? What does he respond when she says, you will give him his freedom?

His wife is initially upset because, as she says, "Thee knows we are against slavery." Caleb tries to justify the purchase of a slave to his wife by saying that he happened upon the slave "at the wharf" . Caleb actually offered offered Amos his freedom many times during the fifteen years of their time together. However, Amos refused, believing in his tribe's tradition of having an older, wiser man to learn from.