If you Google this, you are going to jump through hoops to figure out what’s what.  We think we know a few things now:  there have been several “Market Street Bridges”; this one was the North Market Street Bridge; and it’s gone now.  As for the card, written by a lonely daughter to her mother, it has a larger stamp and two overlapping postmarks from 1913.  All in all, if you collect bridge postcards, this one’s good for you.  Grade: 2