What does Billy do when he finds Boyd's grave?

Billy travels on and finds the cemetery. Boyd is buried against the southern wall and the date indicates that he died on February 24, 1943. Billy buys a shovel and searches for a caretaker of the cemetery. Finding none, he starts digging. After several hours of digging, he strikes the box. He almost considers stopping there but uses the horse to bust the box open. Boyd is there, in his funeral shroud. He rolls the body in a tarp and puts it on the packhorse, heading for the United States.