“So you turned traitor, did you?”

The man sullenly returned:

“Yes, and for good reason. You were plotting for a big stake and only wanted to give me a paltry ten thousand. When we looked at Mr. Field just before leaving the house I saw that he was not dead, and, after we parted, I returned and carried him away, knowing that while I had him in my hands I held the power to make what terms I pleased. Now the plot has failed!”

The answer fully explained the last thing that was a mystery to the detective.

After the two men and the woman had been taken away, Nick turned to Mr. Field.

“Permit me to congratulate you. I thought you had fallen into our old friend Greer’s hands.”

Mr. Field extended his hand and caught Nick’s in a grateful clasp, while he asked:

“Who called you in, Mr. Carter?”

“Mr. Barnes.”

“My blessings on him! He’s a manly, noble fellow!”