Like untold millions, Russell Conwell, author of the famous little book “Acres Of Diamonds” revered Abraham Lincoln, a man he served under as a captain in the 46th Massachusetts Infantry Regiment during the Civil War. But unlike many, he met the man face to face … twice. In the book, Conwell wrote about visiting Lincoln at the White House to plead for the life of one of his young soldiers who had been sentenced to death. “I had been on fields of battle, where the shells did sometimes shriek and the bullets did sometimes hit me,” he wrote. “I never...