Marx is pleased with Capital's sales in Germany and Russia, and the bedridden Jenny shares his happiness. He and Engels are concerned about the rise of Eugen Dühring's ideas in the socialist movement, but Marx is too preoccupied with Jenny, the two remaining volumes of Capital, and studying Russia to write a critique of Dühring's work. Marx regrets not having published their Critique of the Gotha Program about Ferdinand Lassalle and the Social Democratic Workers' Party of Germany...