Dark brown leather briefcase with brass lock

I lost my dark brown leather briefcase yesterday around 3pm outside the Plattsburgh Public Library on Broad Street. It's mid-sized, a little worn at the corners, with a single brass lock and an interior burnt-orange lining. There's a small coffee stain on the top edge, and a chipped rubber bumper on the bottom corner. Inside, a faded red sticker with a mountain emblem and the letters QC sticks to the inner pocket. I keep a photo of my grandmother in there, plus some important work documents I can’t replace. If anyone found it, please reach out—I really need it back; it has sentimental value and a lot of my day-to-day stuff.