I know it's always been a source of contention amongst a lot of fans as to how the Knights of Byzantium found Buffy and co whilst they were doing their mad dash int eh Winnebago. I've read that there was a part of the original script that was left out, which would have involved an explanation along the lines of 'the clerics could locate Dawn'.
Although this would have answered the original question, for me it leads to more questions.
Firstly, why did the Knights of Byzantium not utilise this power of their clerics earlier on in the season, of course it could be that they could only locate her within a general region, and considering she was in the middle of a desert with one highway then it seems plausible they could have figured out her location.
Secondly, if they have always had this ability, then how was the key not discovered/destroyed ages ago, before the monks got it etc.
Thirdly, why didn't Glory directly seek out the Knights and force their clerics to locate the key for her, she obviously knew of their existence, and was fairly familiar with them considering the way she greets their leader in Spiral.
Do you think that it might be that due to these additional questions then they removed this explanation and left it open to interpretation/an annoyingly ambiguous plot device.
Although this would have answered the original question, for me it leads to more questions.
Firstly, why did the Knights of Byzantium not utilise this power of their clerics earlier on in the season, of course it could be that they could only locate her within a general region, and considering she was in the middle of a desert with one highway then it seems plausible they could have figured out her location.
Secondly, if they have always had this ability, then how was the key not discovered/destroyed ages ago, before the monks got it etc.
Thirdly, why didn't Glory directly seek out the Knights and force their clerics to locate the key for her, she obviously knew of their existence, and was fairly familiar with them considering the way she greets their leader in Spiral.
Do you think that it might be that due to these additional questions then they removed this explanation and left it open to interpretation/an annoyingly ambiguous plot device.