I found the lyrics:

Breaking hearts in Halifax County,
The three fine daughters of Farmer Brown,
Turning heads of the boys in the school yard,
Catching whistles from the men downtown.
No one knows why they went rowing,
The three fine daughters of Farmer Brown.
They didn't know that the rocks on the river
Be the Three Sisters Island where they'd all drown

Widower Brown had a girl named Nelly.
She was the oldest the toughest of three.
She would her daddy's well-sharpened sickle
And carve "kill men" in the sycamore tree.
The men come a-courting but she'd keep her distance.
Never cracked a smile, just played it coy.
Some say she's as tender as a petal.
She'd act tough 'cause her daddy wanted a boy.

Old man Brown had a girl named Dottie,
The middle button and the most vain of the three.
She'd take her daddy's fat leather bootstrap
And whip anyone who'd call her Dorothy.
The men would fawn her and she would repay them,
And peck 'em where they'd find it safe to kiss,
Like the barn, or the porch, or the upstairs parlor--
Anywhere that'd keep 'em from her father's fist.

CHORUS

Farmer Brown had a girl named Becca.
She was the youngest and most reverent of all.
She would take her daddy's King James Bible
And go study scripture at the Brethren Hall.
The men would avoid her 'cause she would condemn them
For cussing and drinking and chasing the Browns.
She'd say, "Repent and join God forever.
The pleasure of sin's not as good as it sounds."

One day the three with nothing in common
Spied upon an abandoned rowboat.
Maybe their sense of adventure had pushed
The three young girls to set the ship afloat.
They didn't know the strength of the river,
The merciless current that pulled them down.
Maybe it was the due to the weight of their denim,
But the three girls' bodies were never found.

Some may recall the singing of the Sirens
Lured in the sailors who'd wreck and drown.
Some say they still hear the fighting and the flirting
And the preaching of the daughters of Farmer Brown.

CHORUS

Found here: http://edhead.org/albums/actually/thethreefinedaughtersoffarmerbrown.htm
Will look for the other...