Final answer:
Ralph perceives mutiny through subtle signs of disloyalty, such as whispering and resentment, indicating a loss of control and looming rebellion.
Step-by-step explanation:
Ralph feels the others are being mutinous due to several indicators of disloyalty and insubordination. These include men whispering together in small groups, the display of rebellion by higher officers who act on their own due to resentment, and the changing attitudes of once-trusted individuals.
The mental turmoil and sense of betrayal faced by commanders, paralleled by Ralph's experiences, suggest a loss of authority and the potential for mutiny.