What does the event of the rebels and Yankees singing across the river in harmony foreshadow as Jeff reflects on the people involved in it?
I know it has something to do with Lee Washborne getting shot, but does Clardy shoot him?
Clardy does not shoot Lee Washbourne, although he does order his execution, in an act which only begins to expose the depth of his cruelty and unscrupulousness. The event of the Yankees and Rebels singing across the river, and in particular Clardy's sinister interest in it, foreshadows his treasonous activities in selling guns to the enemy. At the very end of the book, Lucy, in her letter to Jeff, reveals that when a Rebel singer sang a certain song across the river, that was a signal to Clardy that the Confederates had gotten the gold to buy the contraband rifles.