[dancing spawn of ungoliant]

Hi all! I'm quite sure that this last quote could be Boromir in the council of Elrond. I don't have English edition of the books but loose translate about the quote could be:

So that was what happened to the ring! interrupted Boromir. If this tale have ever been told in south it have been forgotten long ago. I have heard about a great ring which is his whose name we don't utter but we believed that the ring had got lost when his first realm came crashing down. Isildur took it! What a news!

Well...very loose translation indeed but maybe you understood my point.
Am I right?