M. Cambon asked me about the violation of Luxemburg. I told him the doctrine on that point laid down by Lord Derby and Lord Clarendon in 1867. He asked me what we should say about the violation of the neutrality of Belgium. I said that was a much more important matter; we were considering what statement we should make in Parliament to-morrow--in effect, whether we should declare violation of Belgian neutrality to be a _casus belli_. I told him what had been said to the German Ambassador on this point. No. 153. _Sir Edward Grey to Sir E. Goschen_. (Telegraphic.) _Foreign Office, August_ 4, 1914. The King of the Belgians has made an appeal to His Majesty the King for diplomatic intervention on behalf of Belgium in the following terms:-- "Remembering the numerous proofs of your Majesty's friendship and that of your predecessor, and the friendly attitude of England in 1870 and the proof of friendship you have just given us again, I make a supreme appeal to the diplomatic intervention of your Majesty's Government to safeguard the integrity of Belgium." His Majesty's Government are also informed that the German Government has delivered to the Belgian Government a note proposing friendly neutrality entailing free passage through Belgian territory, and promising to maintain the independence and integrity of the kingdom and its possessions at the conclusion of peace, threatening in case of refusal to treat Belgium as an enemy. An answer was requested within twelve hours. We also understand that Belgium has categorically refused this as a flagrant violation of the law of nations. His Majesty's Government are bound to protest against this violation of a treaty to which Germany is a party in common with themselves, and must request an assurance that the demand made upon Belgium will not be proceeded with and that her neutrality will be respected by Germany. You should ask for an immediate reply. APPENDIX III Extract from the Dispatch from His Majesty's Ambassador at Berlin respecting the Rupture of Diplomatic Relations with the German Government. (Cd. 7445.) _Sir E. Goschen to Sir Edward Grey_. Sir, _London, August_ 8, 1914.