Chapter 1 Secret Communications / Ralph E. Weber
chapter 2 Ciphers in the American Revolutionary Era, 1775-1789 / Ralph E. Weber
chapter 3 Book Codes and Repertories in the American Revolutionary Era 1775-1789 / Ralph E. Weber
chapter 4 Nomenclators in the American Revolutionary Era / Ralph E. Weber
chapter 5 An Anxious Republic 1789-1801 / Ralph E. Weber
chapter 6 Experimentation, Expansion and Crises, 1801-1815 / Ralph E. Weber
chapter 7 Confidential Reports from Europe and Mexico, 1816-1848 / Ralph E. Weber
chapter 8 A New Generation of Codes / Ralph E. Weber.