Final answer:
Henry's physical presence was characterized by his withdrawn and peculiar behavior, an extreme sensitivity to his environment, and a transformation that left him with an unnaturally pale complexion and heightened senses.
Step-by-step explanation:
During the time period referenced, Henry's physical presence was characterized by a series of unusual attributes that distinguished him from others. He displayed an extreme sensitivity to his surroundings, a fact that transformed his behavior and mental condition.
Henry's peculiarities are elucidated through his connection to the family mansion, which exerts a significant influence on him, and through his idiosyncratic behaviors, such as his avoidance of social interaction and his unnerving stillness and attention to sounds others might not perceive.
Henry's features themselves also underwent a stark transformation; his pallor became more pronounced and his eyes shone with an unnatural luster. Moreover, his heightened senses recorded the minutest details of his environment, indicating a preternatural awareness. This oddity in his physical presence influences not only his own state of mind but also causes discomfort and trepidation in those around him.