Sorry, maybe I should not have quoted that.
It comes from Shakespeare. I believe that Mark Antony said it about a wound in the dead Julius Caesar. What I meant to do was to show that English must not always obey rules to be great. Shakespeare used the superlative degree twice for emphasis.
Something similar happens with the double negative that Beatrice uses in "Much Ado About Nothing" when she says, "Stop his mouth with a kiss and let him not speak neither" (or something like that).