Still in the dark as to the designs of Louis XVI, and believing that the moment for a coup-d'-etat had arrived, Lafayette wrote from his camp a threatening letter to the Assembly, under date of June 16. The Assembly summoned Lafayette before its bar. He refused to appear. His trial was carried on without him, and he was acquitted by an immense majority. The clubs were thrown into a ferment. Danton at the Cordeliers, Robespierre at the Jacobins, organized for the 20th of June a peaceful demonstration to celebrate the anniversary of the oath of the Tennis Court, and to give Louis XVI a solemn warning. A huge multitude, swelled by women and children, gathered and marched down from the suburbs. The men were in arms; each district dragged its cannon with it. The delegates of the demonstration appeared at the bar of the Assembly. The spokesman delivered himself of his message: "Legislators, the people comes this day to make you share its fears and its disquietudes. This day recalls to us the memorable date of the twentieth of June, 1789, at the Tennis Court, when the Representatives of the nation met and vowed before heaven not to abandon our cause, to die in its defense. The people is up and alive to what is occurring; it is ready to take decisive measures to avenge its outraged majesty. These rigorous measures are justified by Article II of the Declaration of the Rights of Man, Resistance to Oppression." While part of the manifestants stationed themselves in the vicinity of the meeting hall of the Assembly, a large body of them planted a tree, symbolic of Liberty, in the garden of the Tuileries. The invasion of the palace gardens was accomplished with perfect order. Louis stood upon a chair in the recess of a window, surrounded by a detachment of National Guards. One citizen, bearing a red cap on the end of a pole, passing in turn before the King, stopped for an instant and cried "Long live the Nation!" Then Louis XVI, leaning over and making a sign to the citizen to approach his pole nearer, voluntarily took the red cap and placed it on his head. A burst of fervid applause, from everyone who witnessed it, greeted the King's act. It was a day of suffocating heat; and Louis, seeing a National Guardsman with a water-gourd, indicated by signs that he wished to drink. The guard with alacrity offered his gourd to the King, who slowly quaffed its contents. But the demonstration of the 20th of June changed in nothing the disposition of the court. Louis XVI continued his shady machinations, and, on the 25th of July, the Duke of Brunswick, generalissimo of the armies of the coalition, issued, in the name of the King of Prussia, the Emperor of Austria, and the Germanic Confederation, a manifesto against France.