Analysis of To Hubert

Dear Hubert, if I ever found
A wishing-carpet lying round,
I'd stand upon it, and I'd say:
'Take me to Hubert, right away!'
And then we'd travel very far
To where the magic countries are
That you and I will never see,
And choose the loveliest gifts for you, from me.

But oh! alack! and well-a-day!
No wishing-carpets come my way.
I never found a Phoenix yet,
And Psammeads are so hard to get!
So I give you nothing fine-
Only this book, your book and mine,
And hers, whose name by yours is set;
Your book, my book, the book of Margaret!