Book #100 in The Trailsman series
Another crossover adventure between Canyon O'Grady and Skye Fargo, aka The Trailsman, this book has them meeting on riverboat. Fargo is there to stop a raiding party of Indians from stealing the grain shipment onboard, which would bankrupt the boat's captain. O'Grady is undercover as a gambler out to stop British gold from being smuggled into the Confederacy to aid their war efforts.