What Is the bet ? Chapter 6

From the text:

Pooh! pooh!” said John Thornton; “Buck can start a thousand pounds.”

“And break it out? and walk off with it for a hundred yards?” demanded Matthewson, a Bonanza King, he of the seven hundred vaunt.

“And break it out, and walk off with it for a hundred yards,” John Thornton said coolly.

“Well,” Matthewson said, slowly and deliberately, so that all could hear, “I’ve got a thousand dollars that says he can’t. And there it is.” So saying, he slammed a sack of gold dust of the size of a bologna sausage down upon the bar.