Sorge is very naive to demand a book on Ireland written from our standpoint. For the last two years I have been intending to write one, but the war, the Commune and the International have brought everything to a standstill. Meanwhile I recommend the following books to Sorge: This is all for the present. However simple the Irish problem may be, it is nevertheless the result of a long historical struggle and hence has to be studied. A manual explaining it all in about two hours does not exist.
Letters: Marx-Engels Correspondence 1872