Foreword / Stephen W. Sears --
Twenty thousand potential spies --
"Known in Richmond in twenty-four hours" --
Mr. Pinkerton's unique arithmetic --
"Outnumbered" on the peninsula --
Hard lessons from Professor Jackson --
Too little and too soon --
All the plans of the Rebels --
Luck runs out for Palmer and Stine --
Blind campaign of Fredericksburg --
New client for attorney Sharpe --
Ten days of southern hospitality --
Rebel spies are now second best --
Gray Fox swallows the bait --
Pinpoint intelligence and hairline planning --
Paralyzed by a real Jackson and a phantom Longstreet --
Lost intelligence, lost battle --
Joe Hooker's magnificent error --
Reaping the Pennsylvania harvest --
Appendixes. Successes and failures of Federal and Confederate intelligence --
A few lessons from (and about) Civil War intelligence --
Two strategic surprises --
Rose Greenhow's reports --
Strother's rejected warning of the enemy's stolen march --
The McClellan-Pinkerton estimates of Confederate numbers --
Pleasanton's role in the intelligence that started Hooker in pursuit of Lee --
Lee's crossing of the Potomac en route to Pennsylvania --