The next moment there was a tremendous commotion. The banners and posters with which the square was decorated were all wrong! Quite half of them had the wrong faces on them. It was sabotage! The agents of Goldstein had been at work! There was a riotous interlude while posters were ripped from the walls, banners torn to shreds and trampled underfoot. The Spies performed prodigies of activity in clambering over the rooftops and cutting the streamers that fluttered from the chimneys. But within two or three minutes it was all over.