Why does Brooks end Chapter Six with March writing letters to his wealthy abolitionist friends asking for donations to Oak Landing, while beginning Chapter Seven with a tranquil family scene in Concord?

Hearing Canning talk about the money he hopes to make at Oak Landing brings March to think about the money he made for himself and subsequently lost. When he and Marmee first married, they lived in a lovely, comfortable house. Even though it isn't the fanciest house in the neighborhood, he strives to provide Marmee and his daughters with every luxury. The couple works tirelessly to bring beauty into their home, and together, they succeed.