Zane Grey 
Shadow on the Trail [EPUB ebook] 

The whistle of the Texas Pacific express train nerved Wade Holden to dare one more argument against the unplanned holdup and robbery his chief had undertaken. Standing there in the dark night under the trees with the misty rain blowing in his face and the horses restlessly creaking leather, Wade thought swiftly, realizing the peril in speaking ill of men Simm Bell chose as comrades for a job of banditry.
“Listen, Simm, ” whispered Wade close to the ear of the lean dark outlaw beside him. “It’s too sudden, this holdup. We’ve got the big bank job all ready.”
“I’ve a hunch, ” replied Bell, with the force of one who never brooked opposition. “We’re ridin’ through this country. Bad weather. Passed the towns at night. No one has seen us. Wade, I’ll get you a bunch of money like pickin’ it off bushes.”
“But these two strangers. We don’t know them.”