What details does the author use to show the ways in which war is changing the atmosphere at Devon?

The author illustrates the changing atmosphere at Devon through vivid descriptions of the once serene campus now overshadowed by the looming presence of war. Tensions rise among the students, as military recruitment and the threat of enlistment disrupt their carefree youth, leading to a loss of innocence. The landscape itself reflects this change, with the idyllic surroundings now tinged with a sense of foreboding and uncertainty, symbolizing the broader impact of the war on their lives.