
Marx to Ruge, February 10, 1842
Marx to Ruge, March 5, 1842
Marx to Ruge, March 20, 1842
Marx to Ruge, April 23, 1842
Marx to Ruge, July 9, 1842
Marx to Ruge, November 11, 1842
Ship of Fools, March, 1843
Marx to Ruge, March 13, 1843
Drag the world into the light, May, 1843
Ruthless Criticism, September, 1843