chpt9: #2. Discuss the importance of the paper the spy seizes (in chapter 9)

Back at the pub, later in the night, two of the Englishmen talk of the need for the Pimpernel to return to France immediately to save the Comtesse's husband, the Comte de Tournay, who has been sentenced to death. But as they begin to read the Pimpernel's instructions for moving forward, they are ambushed by Chauvelin's men. Chauvelin scours the room for evidence and finds a letter signed by Lady Blakeney's brother, Armand. He leaves satisfied, knowing he now has a way to blackmail Lady Blakeney into helping him find the Scarlet Pimpernel.