Blue binder with stamps and coins

I found a blue 3-ring binder filled with stamps and coins this afternoon around 2:15 PM, tucked under a bench outside the Old State Capitol on River Road in Baton Rouge. The binder is blue vinyl, about 9x11 inches, with a faded white label on the spine that reads 'Louisiana Stamp Club.' Inside there are stamp sheets from the 1950s, a few coins including a 1945 nickel and a shiny 1964 quarter, and a bright red bookmark that says 'BR Stamp Club.' There's also a tiny brass coin album keychain clipped to the ring. I know this stuff probably belongs to someone who cares about this hobby, and I’d love to help get it back to its owner.