Many Americans have no idea there are actually four official verses to the "Star-Spangled Banner" — and even fewer know about a little-known, unofficial fifth verse, written a half century later by poet Oliver Wendell Holmes. It goes like this:

When our land is illum'd with Liberty's smile,
If a foe from within strike a blow at her glory,
Down, down, with the traitor that dares to defile
The flag of her stars and the page of her story!
By the millions unchain'd who our birthright have gained
We will keep her bright blazon forever unstained!
And the Star-Spangled Banner in triumph shall wave
While the land of the free is the home of the brave.