Columbia subject headings:
Conrad, Thomas Nelson.
Spies--Confederate States of America--Biography.
United States--History--Civil War, 1861-1865--Personal narratives, Confederate.
United States--History--Civil War, 1861-1865--Secret service.
Harvard subject headings:
Confederate States of America. Army--Spies.
Conrad, Thomas Nelson.
Spies--Confederate States of America--Biography.
United States--History--Civil War, 1861-1865--Personal narratives, Confederate.
United States--History--Civil War, 1861-1865--Secret service--Confederate States of America.
Princeton subject headings:
Conrad, Thomas Nelson.
Spies--Confederate States of America--Biography.
United States--History--Civil War, 1861-1865--Personal narratives, Confederate.
United States--History--Civil War, 1861-1865--Secret service--Confederate States of America.