His voice was low and unexcited.
"You have made a mistake ?" he said.
She took him in at a glance--his clean-cut, strangely attractive face, his slim build, the clear and steady gray of his eyes.
"Yes, I have made a mistake--a terrible mistake!" "I tell you it ain't fair to take offence," Quade went on.

"Now, look here----" In his hand was a roll of bills.

The girl did not know that a man could strike as quickly and with as terrific effect as the gray-eyed stranger struck then.

There was one blow, and Quade went down limply.

It was so sudden that he had her outside before she realized what had happened.
"I chanced to see you go in," he explained, without a tremor in his voice.
"I thought you were making a mistake.