Thank you, Tuor!
(I was looking in the wrong book! I just guessed that it must be someone noble saying "I do not know" instead of "I don't know")
Well, here is a new one:
"---/ -----/ --/ ---/ ----/ --/ -/ ------/ ---/ --/ ----/ ----/ -/ ----/ ---/ ---/." (.........) "---/ --/ -----/ -/ ---/ --/ -----/ ----/ -----/ --/ ---/---/ ------/."