Thank you, Jim !
Have a copy of the tune now, thanks to the iTunes store, and have completed the lyrics you started.

ON THE BANKS OF LAKE PONTCHARTRAIN
Pattie Bryan, Blake & Blake Music, BMI

There was a jewel of a city on the banks of Lake Pontchartrain
Till water rushed down upon her from a terrible hurricane.
By the name of a beautiful lady, on the winds of a demon it came,
Flooding that jewel of a city on the banks of Lake Pontchartrain.

Mothers with babies were crying from hunger and thirst—what a shame!—
Trapped by a break in the levees on the banks of Lake Pontchartrain

Oh, beloved New Orleans, on a swamp without a natural drain
Between the great Mississippi and the banks of Lake Pontchartrain
All who could fled the city, the old and the poor remained
Climbing to attics and rooftops from the flood of Lake Pontchartrain

All the people are homeless, hundreds of lives they were claimed
Drowned by a break in the levees on the banks of Lake Pontchartrain