Final answer:
Based on the given information, it is not possible to determine when Emily's friend Sophia Holland died.
Step-by-step explanation:
Based on the information provided, there is no specific mention of Emily's friend Sophia Holland and her date of death. The passages provided only mention the deaths of Alexandra Ebbling and Margaret Fuller, but there is no information about Sophia Holland. Therefore, it is not possible to determine when Sophia Holland died based on the given information.