Did it have a return address on it? If the quilt came loose from the box, did the quilt have any kind of label to say where the quilt was going too? Did you have insurance or any kind of tracking information on the box? I would call the post office where you mailed it from, give them the address where it was going to, and a detail description of the item you have lost. If it was a small post office, check and see where they ship it to, and call them yourself) They should know where the item would be shipped from (location to location) and something that big should be something they can find. I work for USPS in Florida, packages bust open, and if you do not know what box they came out of, you can't send it on, not unless you have something on the item to let us know. I do hope you find your lost quilt. I myself would be sick if I found one loose in the mail and could not get it to it's destination. or back to the sender. Did the mailman deliver it and someone else could have gotten the box?