Lincoln, Sherman, Davis and the Lost Confederate Gold

The destinies of President Lincoln, General Sherman and Confederate President Davis are forever bound to the Lost Confederate Gold, but questions still linger about those astonishing events:
* Why did President Andrew Johnson's administration believe General Sherman had been bribed with Confederate gold to let Jefferson Davis escape through the Carolinas and Georgia?
* Who were the Confederate secret agents who had been in Canada, and why was a reward issued for their capture after Lincoln ...