The conduct of the Emperor Nicholas on this occasion was most conciliatory to the other Powers. He intimated to them that, if they were united on a scheme to settle the Egyptian question, he would not insist on the special right which he had acquired under the treaties of Bucharest and of Akermann to exclude the ships of war of other Powers from the Dardanelles, and that he would withdraw his few remaining troops from Constantinople and the Bosphorus. Lord Palmerston, on behalf of Great Britain, expressed his admiration of this attitude of the Russian Emperor. As a result, a conference took place in London between the representatives of the Great Powers, at which Lord Palmerston, on behalf of England, and Baron Brunnow, on behalf of Russia, took the leading part. Grave difference soon arose at the conference on the part of France. Its Government, though strongly opposed to Russia obtaining possession of Constantinople, had always been favourable to the claim of Mehemet Ali to an hereditary Pashalic in Egypt and Syria, and had secretly encouraged him to make himself independent of the Porte. It now supported him against the veto of the other Powers. Eventually England, Russia, and Austria, finding that they could not come to agreement with France, decided to act without its concurrence, and to compel Mehemet Ali to evacuate Syria and to restore to the Porte the Turkish fleet. After long discussion between these three Powers, a convention was agreed to on July 15, 1840. They presented an ultimatum to Mehemet Ali, calling upon him to submit himself to the Porte. They promised that if, within ten days of the receipt of the ultimatum, he would give orders for the withdrawal of his army from Syria, and would give up the Turkish fleet to the Porte, he would be recognized as hereditary Pasha of Egypt and as Pasha of Syria for his own life; but, if not, the offer of the life Pashalic of Syria and the hereditary Pashalic of Egypt would be withdrawn, and he would have to content himself with the Pashalic for life of Egypt. It was also intimated to him that if there was refusal or delay the fleets of the three Powers would at once institute a blockade of Egypt and Syria. This ultimatum of the three Powers, when it became known in France, caused the most profound indignation; the more so when, on the refusal of Mehemet Ali to accede to the ultimatum, the British fleet, supported by war vessels of the two other Powers, made its appearance on the coast of Syria. This was thought to be an insult to France. War between that country and England was imminent. There were violent scenes in the French Chambers, and most bitterly hostile articles in the French papers. There were threats of war on the part of the Government of France. But prudent counsels ultimately prevailed, when it was discovered that France was not prepared for a naval war, and that its fleet could not hope to contend with the British fleet in the Mediterranean or to land an army in Syria.