Thank You to Someone Wonderful

I received the sweetest little gift basket yesterday from Burt's Bees full of all kinds of neato baby stuff---lotion, shampoo, oil, powder, etc. It was all wrapped in this adorable basket with a pretty bow and waiting for me boxed-up on my front step when I got home from work yesterday. I scoured the package label, the basket wrapping and all throughout the box, but couldn't find a clue anywhere as to who sent it. Whoever ordered it had it drop-shipped directly from Burt's Bees, so the company return address is all that is listed on the label. I called Burt's Bees this morning to ask if they could tell me who ordered it, but they have some kind of policy against that sort of thing.

So, here's my dilemma: What should I do about acknowledging the gift? I feel wretched having no one to thank for their kind consideration. I have a couple of ideas about who might have sent it, but really, they're just guesses in the dark. Should I email my list of possible senders and ask if they sent it? Or, should I just wait and see if someone calls or emails to ask if I received it?