When Dooley was walking the rope across the saloon, Rena saw Bolo cutting the rope, and Paladin and others saw him holding the knife. It would have shortened the show, but it's surprising that Paladin didn't demand that Dooley be allowed to do the stunt over or force Marquette to forfeit the bet.
Marquette: Put it in a sack, Wally.
Wally: Mr. Marquette, I'd rather not...
Marquette: Wally's got a wife and two kids. He's got to be honest.
Rena: From Marquette? He's too big. He's bigger than you, he's bigger than Dooley, he's bigger than the whole town. And Bolo's just standing on his shoulders.
Paladin: Well they ought to make quite a thump when they fall.
Marquette: All right. I'll boost the ante as far as Dooley can go. One hundred and two dollars and twelve cents. Can you afford that, Mister?
Paladin: Make it a thousand.
Marquette: His life isn't worth that much.
Paladin: Your reputation?
Marquette: I'll see your thousand, make it a thousand more.
Paladin: Why stop there? Three thousand dollars says Dooley can do the stunt.
Marquette: You are on. My reputation, now. Hold the stakes, Bolo.
Paladin: Wait a minute! Six thousand dollars, that's too big a load for such a small character.
Paladin: I was boosting the bet to get you out of it, I was trying to make Marquette call it off! You must have been crazy to let them laugh you into a suicide stunt like that!
Dooley: It's...all set up. Three o'clock, tomorrow afternoon.
Paladin: I've been told that canyon is a hundred feet across and three hundred feet straight down, and a wind like the breath of the devil.
Dooley: Mr. Paladin? You heard what they call me. A monkey on a string? That's all I've ever been. Ever since the circuses quit hiring me.
Paladin: What circuses?
Dooley: A monkey on a string, doing nip-ups for nickels and dimes. I'm a man. Not a monkey.
Paladin: Double-cross is a very ambiguous sign. It points in eight different directions all at once.
John Dehner, who plays Ben Marquette in this episode, played Paladin on the radio version of Have Gun Will Travel.