Keats had proved his abilities in investigation and interrogation and also was a student of philosophy..
When Ginjo was denied a direct contact to the Cogitors, he decided to send his own replacements as Secondaries, and Keats was their leader. They remained for years on Hessra and welcomed Serena Butler eight years later when she came to seek audience by the Cogitors. The next year, Keats as the Secondary of Vidad, led the embassy of the Cogitors to Corrin.
During the final years of the Butlerian Jihad, Vidad resided on Salusa Secundus, tended with now ancient Keats, and another secondary, Rodane. After Vorian Atreides suggested the Great Purge, a massive assault against Omnius, Vidad sought to return to Hessra and consult his fellow Cogitors. By that time however Hessra was taken over by the Titans and his fellows were all dead.
On their arrival, the ship was piloted by Rodane when they were intercepted by neo-cymeks and received the last signal of a secondary-cymek who tried to warn them. Rodane then attempted to escape the planet. Keats grasped the controls and accelerated fiercely to lose their pursuers. The speed was so immense that his elderly body could not withstand the pressure; his bones cracked. When Rodane recovered his senses, he found the old Secondary dead, having given his life to save the ancient Cogitor.