6Chapter 4: Elizabeth Van Lew - The Union's Secret Weapon in Richmond
20Regional Counterintelligence Operations
7Chapter 5: The Secret Messages - Civil War Cryptography
21The Technology of Detection
8Chapter 6: Sarah Emma Edmonds - The Soldier Spy in Disguise
22Security Failures and Lessons Learned
9Chapter 7: Lafayette Baker - Lincoln's Secret Police Chief
23The Destruction of Records
10Chapter 8: Major William Norris - The Confederate Cipher Master
24Legacy and Evolution
11Chapter 9: Antonia Ford - The Belle of Fairfax Court House
25The Invisible War
12Chapter 10: Rose O'Neal Greenhow - The Rebel Rose of Washington
26Conclusion: The Legacy of Civil War Intelligence
13Chapter 11: George Sharpe - Father of Military Intelligence
27About the Author
14Chapter 12: The Shadow War - Counterintelligence Operations
