See, Saw, Seen

Question: Can you use Clairvoyance on distant locations you can currently see? For example, you can see a turn at the end of a hallway. Can you use Clairvoyance on the turn without having ever stood in the turn? If so, can you use Clairvoyance on places you have seen with previous Clairvoyances? For example, if you use Clairvoyance on the previous turn and see another turn further down, can you pay the cost again to set your new point of view to the second turn?

Yes, you absolutely can! If you use Clairvoyance in one location, you are fully capable of using it again at a new location at the edge of your perception, thus seeing new territory that you couldn't have just a moment ago. You can theoretically jump all over the place using only Clairvoyance to get knowledge of a much larger area; if you have a decent perception radius, you can basically image-map entire areas as long as you're willing to keep on spending the cost over and over again.

Of course, you could also just get up and walk over there, which would probably be cheaper and easier, but hey, the option's there if you happen to be deep in enemy territory or just really lazy. Clairvoyance really gives you the option of true farseeing; you can see as many faraway landscapes and places as you're willing to dump Legend on.