 The Communist League also had contacts with the underground conspiratorial organisation of Louis Auguste Blanqui.Many of Marx's and Engels's current friends became members of the Communist League.Old friends like Georg Friedrich Herwegh, who had worked with Marx on the "Rheinsche Zeitung", Heinrich Heine, the famous poet, a young doctor by the name of Roland Daniels, Heinrich Bürgers and August Herman Ewerbeck all maintained their contacts with Marx and Engels in Brussels.