Chapter 2: A New Nation "Spies!" Introduction      In this chapter, you learned about the significant battles of the American Revolution. The war, however, was not fought on battlefields alone. Throughout the conflict, both the British and the Americans operated an elaborate spy network in an effort to steal vital military information from the other side. As a result, each side devised complex and elaborate schemes for keeping their secrets from falling into enemy hands. Go to the Internet to find out about some of these methods and techniques. Destination Title: Spy Letters of the American Revolution Note: Clicking on the link above will launch a new browser window. Need help using your browser for this activity? Click here for tips. Directions Start at the Spy Letters of the American Revolution Web site. Click on Secret Methods and Techniques. Read about the various methods of information concealment, then answer the following questions. 1. What are ciphers? 2. What was the standard procedure for producing, as well as reading, a message written in invisible ink? 3. In what way was a Mask Letter two letters in one? 4. Work with a classmate to create a Mask Letter. Then give the letter to another pair. Have one member try to determine the secret message with the mask or grill and the other without it.