Henri Tolain, Perrachon, and Limousin visited London in July 1863, attending a meeting held in St. James's Hall in honour of the Polish uprising. Here there was discussion of the need for an international organization, which would, amongst other things, prevent the import of foreign workers to break strikes. In September, 1864, some French delegates again visited London with the concrete aim of setting up a special committee for the exchange of information upon matters of interest to the workers of all lands.