Red leather stamp album with vintage US stamps

I lost my red leather stamp album yesterday around 3pm near the Bemidji Public Library on 4th Street. It's about 8x6 inches, with a cracked spine and a blue ribbon bookmark sticking out. Inside are stamps from the 1950s and 60s, mounted on worn pages, with a couple of loose stamps peeking out near the back. There's a faded note tucked inside with my grandfather's initials, and a tiny coffee stain on the cover that forms a heart shape. This collection is sentimental to me—my dad started it and I hoped to pass it on someday. If you found it, I'd really appreciate getting it back; you can message me here.