Curator Shannon Pratt, 37 polishes a case containing a signed ‘Float like a butterfly sting like a bee’ robe worn by cornerman Bundini Brown at the ‘Rumble in the Jungle’ fight.

“Float like a butterfly, sting like a bee. The hands can’t hit what the eyes can’t see.” The phrase was often repeated to describe his style in the ring, and became shorthand for the man ...