There is something wrong, and he is afraid of exposure.

You remember the young man who walked home with me last night: Well, he is a mining engineer.

He has agreed to examine into the claims of the 'Little Yankee' people, and this--this Farnham wants him stopped.

You understand?
He sent for me to use my influence and make him go away.

I refused, and then this--this creature threatened to kill Mr.Winston if he remained in camp, and--and I know he will." The Mexican's great black eyes widened, but not with horror.