It was Christmas Eve 1875 and Ira Sankey was traveling on a Delaware River steamboat when he was recognized by some of the passengers. His picture had been in the newspaper because he was the song leader for the famous evangelist D.L. Moody. They asked him to sing one of his own hymns, but Sankey demurred, saying that he preferred to sing William B. Bradbury's hymn, "Savior Like a Shepherd Lead Us."

As he sang, one of the stanzas began, "We are Thine; do Thou befriend us. Be the Guardian of our way." When he finished, a man stepped from the shadows and asked, "Did you ever serve in the Union Army?"

"Yes," Mr…