What complaint does Mrs. Merriweather make about the way the blacks have been acting?

Mrs. Merriweather is complaining that the blacks have been grumbling since the outcome of the trial (Robinson was found guilty).

"Nothing, Jean Louise," she said, in stately largo, "the cooks and field hands are just dissatisfied, but they're settling down now-they grumbled all next day after that trial."

Mrs. Merriweather faced Mrs. Farrow: "Gertrude, I tell you there's nothing more distracting than a sulky darky. Their mouths go down to here. Just ruins your day to have one of 'em in the kitchen. You know what I said to my Sophy, Gertrude? I said, 'Sophy,' I said, 'you simply are not being a Christian today. Jesus Christ never went around grumbling and complaining,' and you know, it did her good. She took her eyes off that floor and said, 'Nome, Miz Merriweather, Jesus never went around grumblin'. I tell you,

Gertrude, you never ought to let an opportunity go by to witness for the Lord."