When I left the Mystery Box at the doorstep of the house thought to be Baerbel Hartt’s, I walked away without a sense of closure. There was no pleasurable feeling, knowing that I’d done the right thing in the right way; what if she had moved and would never get her Christmas presents?
Today the feeling came in a wave; I received a lovely thank you card from Baerbel, and I immediately knew that the entire affair had drawn to a satisfactory close. How astute of her -or merely gracious! Either one is fine with me… 
Thanks again to everyone who helped, and to Baerbel for putting the finishing touch to the story.
How wonderful! I’m so glad she sent you a note, what a lovely thing to do. You were pretty great too - going to all that trouble when you could have simply taken the box back to the post office.
You know - there are still lots of great people in this world. :-)