Aach-Ti reaches out with his mind across Sek's ship, sensing only Mr. star and Mistress Blake. Seeing as they where safe, he moved onto the psychic from before, attempting to find him. Aach-Ti does find some form of large mental source across the atmosphere. He didn't get an exact location, but he knew it was somewhere on the planet's surface, near a collection of several other sentient beings.
The other minds made it difficult to sense this disturbance out. This meant that this telepath knew what he was doing.