Final answer:
Without additional context, it is difficult to determine what keeps a character from throwing stones at another; it could be due to moral conflict, societal norms, or other internal or external factors, which are common themes in literature.
Step-by-step explanation:
It appears that the section provided is attempting to portray a scene in which moral conflict or internal restraint prevents a character, possibly Roger, from throwing stones at Henry. Unfortunately, without further context, it is difficult to pinpoint the exact moment and reasoning.
In literature, characters may be held back by an innate sense of right and wrong, societal norms, fear of repercussions, or a sudden realization of the potential consequences of their actions. This internal or external conflict can contribute to the theme and character development within the story. An analysis of the text to determine what keeps Roger from throwing the stones would consider these aspects.
The layers of complexity in human decision-making and the struggle between impulse and restraint are common subjects in literary exploration.