From Cowboy Fireman/His Trusty Lariat;

"My gosh" the hog head shouted
As he slammed on all the brakes
"I'll never stop this SP train
I ain't got what it takes"

They buried that poor fireman
Where the prairie wind blows wild
He killed two hundred passengers
But, thank God, He saved the child

It's a parody of Saved from Death by George Hersee, published 1874;

The engineer sees the child
The whistle screams, Down brakes
And as he throws the lever back
No nerve or muscle shakes

His eye is quick, his nerve is great
His soul knows no alarms
O God! That wheel will crush the child
No, no, 'tis in his arms!