As in Paris, so too in Brussels, Marx frequented the society of German working men in order to instruct them by lectures and by conversation. He was loyally seconded by Engels, who had more time and more money to devote to this task, and who worked for the new doctrine in Paris, Cologne, Elberfeld and other towns. Since 1836 the German working men living abroad had been organised in the League of the Just, which from 1840 had its head-quarters in London. The individual groups were kept in touch with one another by means of Communist correspondence committees. The Paris and Brussels groups drew the attention of the London Committee to Marx, and in January, 1847, Joseph Moll, one of its members, was commissioned to go to Brussels and obtain information about Marx.--("Mehring's Introduction to the Reprint of the Cologne Communist Proceedings," published by _Vorwaerts_, Berlin, 1914, pp. 10-11.) The result was the transformation of the League of the Just into the League of Communists, which held its first Congress in London in the summer of 1847, Engels and Wilhelm Wolff (Lupus) being among those present as delegates. At the second Congress, held in London towards the end of November and beginning of December, 1847, Marx also appeared, and together with Engels was commissioned to prepare a new program. The new program is the Communist Manifesto. Engels had come from Paris, Marx from Brussels. Before leaving Paris, Engels wrote a letter to Marx, dated November 24, in which he speaks as follows on the subject of the Manifesto: "Just think over the confession of faith a little. I believe it will be best if we leave out the form of catechism and entitle the thing 'The Communist Manifesto.' And then, as more or less of it will consist in historical narrative, the present form is quite unsuitable. I am bringing along the manuscript which I have written; it is a plain narrative, but is badly put together, and has been done in a frightful hurry. I begin, 'What is Communism?' and then straight away with the proletariat--the history of its origin, difference from earlier workers, development of the antagonism of the proletariat and the middle class, crises, conclusions, with all kinds of secondary considerations thrown in, and lastly party politics of the Communists, as much as is good for the public to know."--("Correspondence of Marx and Engels," Vol. I., p. 84.)