Lyrics below copied from Public Domain Music and corrected a bit by me, based on the sheet music images at The Library of Congress American Memory Collection (which are a bit more legible than those at The Lester S. Levy Collection of Sheet Music).

Whitlock's Collection of Ethiopian Melodies.
as sung with great applause by
William Whitlock
at the
Principal Theatres in the United States
No. 3 of 12
OH! WAKE UP IN DE MORNING
Words by W. C. T.
& Sung by
William Whitlock.
New York: C. G. Christman, 164 Pearl Street, 1847.

1. Oh! I was born in Tenese
War de sihts de boys do see
Oh I did wake dem ebry morn
And dis de way I blowd my horn
Oh! wake up in de morning
Oh! wake up in de morning
Oh! wake up in de morning
afor de brake ob day.

2. My massa owned a pretty gal
De folks dey called her yaller Sal
De greatest gal in that big place
Wid de broadest foot and blackest face
Oh! wake up——

3. Dis Sal was tall as you could see
Her shape was like de poplar tree
And when she passed de dogs dey howled
De bullfrogs screamed and tadpoles growl'd
Oh! wake up——

4. And Sal she had a lubly moufe
Twould reach de poles from norfe to soufe
And when it oped from ear to ear
You'd jump about a foot from fear
Oh! wake up——

5. De Darkies once did gib a ball
Dey hab it at de darkies hall
So Sall and I to de ball did go
War we did out de biggest show
Oh! wake up——

6. While sal was dancing in a reel
A nigger stept upon her heel
She turned around to gib a grin
Open'd her mouth and her head fell in
Oh! wake up——

7. Dey formed a jury on de spot
De Darkies sweet it was so hot
But pity changed to deep dispair
When her leg give a jerk and her body was'nt dere
Oh! wake up——