Kaldur'ahm will be given access to the Restricted Section of the Seelie library to learn the Scrying Spells there, which he will be given an aptitude for. When looking at a map and thinking of someone, he will be able to hone a sixth-sense for their general location. As he practices, this ability will strengthen! Ultimately, we'll leave a sensible time-frame based on your character's yen to learn this up to you.