Iṃgor followed Sapphire, even though she likely had an overview of the entire town, an overview doesn't help when locating specific targets, something his tracking spell was practically made for. He assumed she knew he had some sort of tracking spell, but not its versatility due to the option to set completely custom conditions.
After a sigh, he informed his other teammates: "I'll help her look. Six eyes and 1 spell see more than 4 eyes."
After catching up on Sapphire Iṃgor asks if he can see the artifact a littlebit closer, hoping to see a pattern for which he can search. In the process he explains that his spell can track anything the caster can define clearly.