What does Florent visualize at the beginning of Chapter 6?

The chapter opens with Florent taking a walk through Paris, visualizing how the insurrection will take place. He begins at the Palais-Bourbon. Convinced that the time for action is drawing near, Florent sees in his imagination where the cannons would be positioned and in a notebook maps out various points of attack: "Already he could see the fighting, the groups of men clinging to those columns [...]" (250).