Black leather briefcase with brass clasp, MB initials

I lost my black leather Tumi briefcase yesterday around 3pm near the Church Street Marketplace in Burlington, Vermont. It's a slim 14-inch briefcase with a brass clasp and a slightly worn finish. On the outside, the initials 'MB' are engraved on a small brass plate, and there's a tiny dent on the top left corner from a stumble last week. Inside, you'll find a green USB drive labeled 'VT', a stack of legal pads, and my volunteer notes notebook. It has sentimental value to me and I really need it back; it also contains work materials I can't replace.