Why are there F's when there should be S's in The Declaration of Independence?

Watch this video to find out...

Are they F's after all?

Schoolhouse Rock!: "Fireworks"

Music & Lyrics: Lynn Ahrens
Performance: Grady Tate
Animation: Phil Kimmelman and Associates

Ooh, there's gonna be fireworks (Fireworks!)
On the Fourth of July (red, white, and blue!)
Red, white, and blue fireworks
Like diamonds in the sky. (diamonds in the sky!)
We're gonna shoot the entire works on fireworks
That really show, oh yeah,
We declared our liberty 200 years ago.

Yeah!

In 1776 (fireworks!)
There were fireworks too (red, white, and blue!)
The original colonists,
You know their tempers blew (They really blew!)
Like Thomas Paine once wrote:
It's only common sense (only common sense)
That if a government won't give you your basic rights
You'd better get another government.

And though some people tried to fight it,
Well, a committee was formed to write it:
Benjamin Franklin, Philip Livingston,
John Adams, Roger Sherman, Thomas Jefferson,
They got it done (Oh yes they did!)
The Declaration, uh-huh-huh,
The Declaration of Independence (Oh yeah!)
In seventeen hundred seventy six (Right on!)
The Continental Congress said that we were free (We're free!)
Said we had the right of life and liberty,
...And the pursuit of happiness!

Ooh, when England heard the news, (Kerpow!)
They blew their stack (They really blew their cool!)
But the colonists lit the fuse,
There'd be no turning back (no turnin' back!)
They'd had enough of injustice now
But even if it really hurts, oh yeah,
If you don't give us our freedom now
You're gonna see some fireworks!

And on the Fourth of July they signed it
And 56 names underlined it,
And now to honor those first 13 states,
We turn the sky into a birthday cake.
They got it done (Oh yes they did!)
The Declaration, uh-huh-huh,
The Declaration of Independence (Oh yeah!)
In seventeen hundred seventy six (Right on!)
The Continental Congress said that we were free (We're free!)
Said we had the right of life and liberty,
...And the pursuit of happiness!

We hold these truths to be self-evident,
That all men are created equal
And that they are endowed by their creator
With certain inalienable rights.
That among these are life, liberty, and the pursuit of happiness.

And if there's one thing that makes me happy,
Then you know that it's (ooh)
There's gonna be fireworks!

Too Late for the King to Apologize

Too Late (for the King) to Apologize
by Soomo Publishing

Halfway across the globe
And we're standing on new ground
Screaming 'cross the waves
You can't hear a sound
There's no fair trials, no trade, no liberties
No tea
We've colonized America; we won't stand for tyranny,
Oh king
And it's too late to apologize
It's too late
I said it's too late to apologize
It's too late
We've paid your foolish tax, read the acts
And they just won't do
We want to make it clear, we believe this much is true
All men were created with certain
Unalienable rights
Among these are life, liberty, and the pursuit
Of happiness
And it's too late to apologize
It's too late
I said It's too late to apologize
It's too late
It's too late to apologize
It's too late
I said it's too late apologize
It's too late
I said it's too late to apologize, yeah
It's too late
I said it's too late to apologize, yeah
Halfway across the globe
And we're standing on new ground