From "The Man from U.N.C.L.E.: The Bridge of Lions Affair: Part II (#2.21)"
Strange. Locked in this book is the secret of immortality, perhaps. Why do scientists always insist on keeping their notes in code?
Well they were able to decipher the notebooks of Leonardo da Vinci in a little less than three hundred years. That should offer us some hope.
Well I'm afraid gentlemen, in my position and at my time of life, that's much too long to wait.