Final answer:
Upon seeing Georgiana, Aylmer's intense and urgent reaction leads him to grip her arm, inadvertently causing her harm.
Step-by-step explanation:
The passage describes a significant change in Aylmer's reaction as he sees Georgiana; he initially reddens, indicating a strong emotional response, then becomes even paler than before. This reaction suggests that he is shocked or shaken by her appearance. When Aylmer rushes towards Georgiana and grips her arm strongly enough to leave a mark, it is clear that Aylmer hurt Georgiana while gripping her arm. The intensity of Aylmer's emotions and his physical response in seizing Georgiana’s arm suggest an interaction that is charged with urgency and perhaps distress.