By agreement with the Greek Premier, the Allies began to land troops at the Greek port of Salonika in the first week of October. The Greeks objected, but did not hinder us; indeed, they helped our army to occupy the place. Then came a remarkable change of front on the part of the Greek king. He had married the Kaiser's sister, and he went in fear of his brother-in-law. Probably he believed that Germany was going to win; he knew that Bulgaria was strong and Serbia weak, and that the 150,000 troops of the Allies could not turn the balance in his favour. So he informed his Prime Minister that he had never consented to fight on behalf of Serbia; whereupon the Prime Minister resigned, and a new Government was formed. It declared that Greece meant to remain neutral, though it was very friendly to the Allies. While our transports were crowding the harbour at Salonika and the Allies were busy putting the place into a state of defence, Ferdinand threw off the mask. A week later, on 12th October, when his advance guards were over the border, he declared war on Serbia. Four days later Britain declared war upon Bulgaria. Von Mackensen had already crossed the Danube, and was pressing against the Serbian front with 200,000 men; a quarter of a million Bulgarians were moving eastwards against the exposed right flank of Serbia; and in Salonika there were 13,000 French and British troops preparing to march inland against the Bulgarian left. Such was the position of affairs on 15th October. * * * * * Now let us return to the Danube and briefly follow the stages of Serbia's agony. By means of the great river, which is linked with the canals of the Elbe and the Rhine, barges full of big guns and supplies had been conveyed to the scene of action. On 19th September, before the big guns arrived, Austrian batteries opened fire on Belgrade; but the Serbians and the British sailors who were fighting with them prevented a crossing. On 3rd October the enemy's big guns were placed in position, and the Serbian trenches were pounded to dust. It was the Donajetz bombardment all over again. Belgrade could no longer be held, and by the 8th of October the Austrians and Germans had crossed the Danube and the Save at six places between Shabatz and Belgrade. There was a desperate struggle in the streets of the capital, but on the morning of the 9th the place was in the enemy's hands. The lesson of Warsaw had been learned, and all that was valuable in the city had been carried off.