How did the letter "L" save Abraham Lincoln and the United States as a Union?

You may not realize it but there was a serious plot to defeat Abraham Lincoln from being President of the U.S. This is a fascinating story of how the letter "L" was misplaced in a letter and was discovered to be part of a Democrat plan to defeat Lincoln and keep slavery legal. You will enjoy this "spy" and "espionage" story. It is a true story from a young Army officer named Henry Bascom Smith about how he helped defeat this plot. Enjoy my friends.