Sinclair's Luck by Percy F. Westerman — Read

"NOW, now, you fellows! " interrupted Colonel Narfield's voice from the vicinity of the blazing fire, "palaver ended. Not another word, or you'll both be fat-headed in the morning."

Both lads relapsed into silence. They knew perfectly well that with Colonel Narfield an order was an order in whatever form it was expressed. For the time being, then, Colin's explanations of his surprising theory had to be shelved.