I agree with the Triangulation, but I think the thing I am thinking through is that I don't know if LC makes the Locator Spells more powerful...reaching further/overcoming more issues. I thought that once he found that he could not make any Locator Spell work that it made LC not valuable to the operation. It takes a long time to use LC and has lots of other issues as well. If he could get a Locator Spell up, then I would have expected him to use LC. But given his inability to get one going - and he tried several different ways, that it meant he could not use Locator Spells in any way to locate Thomas. As I recall the other LC uses, he connected first with a standard locator and then used LC as an way of adding value to the tracking not a way to start the tracking.