How far has the underground revolution progressed by now? What is the important fact that Sam Adams stresses in explaining how the British soldiers got to the ammunition from Charleston?

At the Observer’s meeting, many of the men speak at length for the first time about why they are revolting against the British. They discuss a recent conflict. General Gage had sent some British troops to the countryside to seize rebel gunpowder. Nearly a thousand Minute Men had come to prevent the British from leaving Boston, but they had arrived too late. Although the rebels had failed in this case, Sam Adams is still pleased that they were able to get so many men.