Friedrich Lessner: "I was working in London then and was a member of the communist Workers' Educational Society at 191 Drury Lane. There, at the end of November and the beginning of December 1847, members of the Central Committee of the Communist League held a congress. Karl Marx and Frederick Engels came there from Brussels to present their views on modern communism and to speak about the Communists' attitude to the political and workers' movement. The meetings, which, naturally, were held in the evenings, were attended by delegates only... Soon we learned that after long debates, the congress had unanimously backed the principles of Marx and Engels..."
http://www.marxists.org/archive/marx/works/1847/communist-league/index.htm
1847... and before. Not unlike extreme Islamism, Communism is a cancer that spreads slowly over a long time and consumes its' prey one cell at a time.
Good read, thanks.