"In the late 1950s, as America prepared for the Civil War centennial, two very old men lay dying. Albert Woolson, 109 years old, slipped in and out of a coma at a Duluth, Minnesota, hospital, his memories as a Yankee drummer boy slowly dimming. Walter Williams, at 117 blind and deaf and bedridden in his daughter's home in Houston, Texas, no longer could tell of his time as a Confederate forage master. The last of the Blue and the Gray were drifting...