Here it is, from "Frontier Ballads," by Charles J. Finger, 1927, p. 114f.

"That fire of inspiration which filled the Armless Wonder led him to adapt strange songs to local conditions. By way of instance I give his Gently Does the Trick which has all the earmarks of a parody. He sang it to this catching tune: [Music notation appears here.]

GENTLY DOES THE TRICK

1. Come all and hear me sing
A song both good and wise.
I'll make the canyon ring
With valuable advice.
In going through this world,
You'll find it rarely wrong
To keep a steady pace
And keep on going strong.

CHORUS: For it's gently, softly, slowly does the trick.
Get on easy, careful; never be too quick.
The bronc fresh from the pasture
May not be a speedy laster,
For it's gently does the trick.

2. Now if in prison you
Should happen for to land,
For picking up a steer
That bears a stranger brand,
Be gentle, meek, and mild.
In that way you may gain,
But if you cut up rough,
You'll get the ball and chain.

CHORUS: For it's gently, softly, slowly does the trick.
You'd walk clanky, hobbledy, not a bit too quick.
They'd keep your legs in order
And you'd softly cuss the warder,
Saying, "Gently does the trick."

3. If a broncho bucks
And lifts you in the air,
You have a kind of feel
You'd rather not be there.
Your elevation feels,
Well, anything but nice,
But don't come down a whack;
Just take a friend's advice:

CHORUS: Come down softly, gently, easy does the trick.
Just fall easy, careful; never be too quick.
Your eye the distance gauges
So you land by easy stages,
For it's gently does the trick.

"The song was taken up by the funny man in Mollie Bailey's Great Road Show and so gained a wide popularity. For Mollie Bailey was our Barnum, our Jefferson, our universal impresario. Her outfit consisted of a dozen horses and a few wagons, and she made her rounds to places where the railroads did not touch, or to railroad points unvisited by larger shows…. Mollie Bailey was responsible for a tremendous amount of blurring of original authorship. But after all, popularity makes the folk song in the long run."