["By Jos H McKeon, Harry M Piano, W Raymond Walker", with lyrics

rewritten by an uncredited Irving Berlin]

[1st verse:]
Now sweet Flo and Joe with lights burning low
Sat spooning as all lovers do
Her wee sister Rose
Stood up on her toes
And eagerly kept peeping through
Oh my, oh what bliss
She soon heard them kiss
As he gently called her "my dear"
The very next day
When Flo came her way
She whispered these words in her ear:

[chorus:]
Oh! what I know about you
Oh! what I know about you
Don't say you didn't 'cause I overheard
Honest to goodness, I won't say a word
Oh! what I know about you
Something that I wouldn't do
Far be it from me
To repeat what I see
But, oh! what I know about you

[2nd verse:]
Next evening when Joe called 'round to see Flo
He found little Rose all alone
In her cunning way
He soon heard her say
"My sister said she's not at home"
Her face wore a grin
She said, "Please come in"
Poor Joseph, oh my, what he saw
There sat pretty Flo
With her other beau
Rose cried to her sister once more: