[Alfirin]

Your right I had forgotten both that stone and the fact that Tindrock was unreacable. I guess the hills of Eye and Ear relied on fast horses to get thier messages to the rulers.

So, it looks like all stones are accounted for and the two left at the end of the war of the ring are the only two available (I am asuming that, for the purpose of the argument the Anor stone, while nearly usless now, would still be kept somewhere, and that the Ithil stone was indeed blown up when Barad-Dur fell).
A pity. Those who are fond of writing fanfics (or RPG scenarios) might want to consider what might happen if the Osgilath stone was somehown recoved from the bed of the Anduin (by say an earthquake changing the path of the river ore someone late in the forth age putting locks in the river. I have always beived that the river wolnt not have destoyed the stone just made it utterly inacessible and by Third age tech irretrevable.