Kerlokh moves to 45 feet past Hobbes and the end of the tracks (in the direction they were going) and activates his dragonmark, to Locate the nearest Mechanical Lock, within 440 ft.
[sblock]Locate Object
Divination
Casting Time: 1 standard action
Range: Long (400 ft. + 40 ft./level)
Area: Circle, centered on you, with a radius of 400 ft. + 40 ft./level
Duration: 1 min./level
Saving Throw: None
Spell Resistance: No
You sense the direction of a well-known or clearly visualized object. You can search for general items, in which case you locate the nearest one of its kind if more than one is within
range. Attempting to find a certain item requires a specific and accurate mental image; if the image is not close enough to the actual object, the spell fails. You cannot specify a unique item unless you have observed that particular item firsthand (not through divination).
The spell is blocked by even a thin sheet of lead. Creatures cannot be found by this spell. Polymorph any object fools it.
For the purposes of this spell-like ability, Kerlokh is a 1st level caster [/sblock]
He walks in a 45ft diameter circle around the spot where the tracks stopped (i.e. a 45ft circle around Hobbes.) He stops when he gets back where he started (which takes about 1 minute) or when he senses a lock, whichever comes first. My total sensory area is then anything within 485 ft of Hobbes