How come Rivendell was never discovered by Sauron?

[Grey Fool]

<font face="Verdana"><table><TR><TD><FONT SIZE="1" face="Verdana, Helvetica, sans-serif">Pile o' Bones
Posts: 13</TD><TD></TD></TR></TABLE>
<img src="http://www.barrowdowns.com/images/posticons/sting.jpg" align=absmiddle> Sauron's wit

Unlike me, Sauron was no fool, except in the respect that he would hunt power to the detriment of all other
concerns. There is no way that he would have wasted time 'attacking' the last homely house in an attempt to obtain Elrond's ring, as he would have known that Elrond the Immortal was never to be underestimated. Had such an offensive been launched, Elrond would have been wqell aware of it before any creature of malign intent had entered the valley of Rivendell, and Sauron knew he would have been thus thwarted. I feel certain that Elrond would have rid himself of his ring for good in order to prevent Sauron getting it, or at least he would have taken measures to ensure its' safety.
And Sauron knew all too well about Imladris.
After all, rhymes reach far and wide:

&quot;Seek for the sword that was broken:
In Imladris it dwells;
There shall be counsels taken
STRONGER THAN MORGUL SPELLS...&quot;


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