Mystery envelope update

I've just packaged up the card I found at the library last Saturday. I included the unopened envelope, as well as a hand-written letter:

Dear G.,

I was in the downtown branch of the public library this weekend browsing the knitting books, and this card fell out of "Knitting Without Tears." I don't know how long it's been in there, but if you're anything like me (and you must be a little like me, if you're a knitter), it drove you crazy that you lost that card to Mary before you got to mail it. Now you know where it went! Thanks for letting me carry around a little bit of a mystery for a few days.

[my name and email address]
(in case you want to let me know what was in there... or not. Just in case.)

That last bit felt so much like writing to a pen-pal for the first time, all sweaty palms and "please write me back, I'll be ever so glad! Please tell me about where you live and whether you have any pets!" Kind of goobery. Can't help it. This is fun. Updates as they come. If they ever do. This may very well be the last I see of my mystery card.