Brown leather briefcase with brass clasp

I lost my brown pebbled leather briefcase yesterday around 3pm outside the Leeds Corn Exchange on Boar Lane. It's the size of a laptop bag, with a brass double latch and a small dent on the bottom right corner. Inside there's a red fabric lining, a USB drive, a notebook, and a post-it note with the initials 'P.S.' tucked in the outer pocket. It has sentimental value and contains work documents I really need back for an upcoming project. If anyone found it, please contact me—I’d be grateful to get it back.