Lost navy blue JanSport backpack with dolphin pin

I lost my navy blue JanSport backpack yesterday around 8pm near the Riverwalk on Market Street in downtown Wilmington. It's a 15-inch backpack, a bit scuffed on the bottom from city bus rides, with a bright red zipper pull on the main pocket and a small green enamel dolphin pin on the front pocket. Inside I kept my lab notebook, a folded photo of my grandmother, and a scribbled schedule for tomorrow's classes. It has sentimental value—my grandmother gave me the pin years ago, and the notebook holds my most important notes for finals. If anyone found it, I’d really appreciate getting it back.