This is a great creative piece on Down in the Dumps. There is a good balance between offering condolences and support for her relationship, just as a real friend would. I like how you choose to use terms that are era appropriate for the time this was written e.g. “lad”, it helps give the piece a sense of belong with Patrick White own writing style.
It is always difficult to know what to say to people experiencing loss so I like that you finish the letter on an optimistic note that offers Meg advice, something a young girl who feel isolated from her family requires.
The picture you choose to accompany this piece is also a fantastically appropriate choice.