Marguerite is working as maid at Mrs. Cullinan's house. She does't even try to remember Marguerite's name and insists in call her Mary. Also, Mrs. Cullinan behaves rudely with Marguerite, this strongly upsets Marguerite who is unable to quit the job because her mother doesn't let her, so she decides to drop Mrs. Cullinan's favorite dishes to get fired. After that Mrs. Cullinan starts to call her Margaret, which Marguerite accepts because is closer to her real name and she was happy that the woman admitted that her name wasn't Mary.
It means he went away from the main group to come up with a plan to solve the problem/conflict. I believe he will use magic to (I don't know what the conflict is, but this is where you'd put how you think he'd fix it)
Answer:
I believe it means to cherish the memories that you have with the people you love the most and to never let go of those memories