Dietrik
Dietrik shows you to his office. You've been here before on expeditions such as this. His office is well organized. He is the sole keeper of records of regarding land ownership in the area. He is definitely a bookish fellow.
He pulls out a folder with several maps in it, all displaying the area north of Diamond Lake. He spreads several of the maps out over his table. The pair of you go over the maps, marking out likely points where searchers should concentrate.
You mark off a small gorge to be the destination of one scouting party. A cluster of fruit trees as another likely target, since the boy would probably be hungry by now. Finally, you mark off an old abandoned mine manager's office, where the boy might have taken shelter.
Those are the only likely places you find on the recent maps. However, you notice a small peculiarity in one of the maps. This particular map looks very old. On it, you notice a bit of faded writing noting a location labeled 'Whispering Cairn'. You've never heard of that Cairn before.
Unfortunately, before you can give it much thought, the Lieutenant returns and starts rushing you out the door to begin searching. You start heading towards the old Mine manager's office.