One shell fell in Trafalgar Square. The Zeppelins passed over the Houses of Parliament, Westminster, and other famous buildings, but apparently did not have their location well in mind as these noted monuments escaped harm. But the Zeppelins had come. And they left scars which greeted Londoners the following morning to prove that the raid was not a bad dream which would disappear with the morning mists. In addition to the four persons killed, seventy others were injured, some of whom suffered the loss of limbs and other injuries that incapacitated them. Immediately there was a cry for revenge. Some of the newspapers advocated reprisals upon German cities. This the government refused to do and steadfastly adhered to a policy of war upon fortified places and armed men alone. Rioting took place in many districts where Germans were numerous. Shops and homes were looted. Every German who appeared in the streets, or any person who looked like one, was liable to attack. A number of aliens were badly handled. The public declared a spontaneous boycott upon every person having a name that seemed to be of German origin. There was a united movement to obtain some reparation for the Zeppelin raids. But the results were only trifling and the indignation died down with the passing days, British calmness soon succeeding the excitement of a moment. Italian frontier towns became the goal of Austrian airmen on June 1, 1915. A half dozen persons were killed or injured and there was some property damaged. With warm weather and good flying conditions raids were in order every day. On June 3, 1915, British aviators made a successful attack upon German airship sheds at Evere, Belgium. The same day French machines bombarded the headquarters of the crown prince in the Argonne, with what results never was definitely established, although there were reports that several high officers had been killed. It was made known in London on June 3, 1915, that Great Britain and Germany had agreed to a plan for the protection of public buildings from air raids. According to this agreement hospitals, churches, museums, and similar buildings were to have large white crosses marked upon their roofs. Both governments pledged themselves to respect these crosses. Much importance was attached to the idea at the time, but its effects were disappointing. The marks either were not readily perceivable from an aeroplane or the pilots did not trouble themselves too much about the crosses. Public buildings continued to suffer.