It was during John 's time as secretary that he wrote his two most famous works , the Policraticus and the Metalogicon .
John of Salisbury was secretary to Theobald for many years , and after Theobald 's death became Bishop of Chartres .
It was during secretary 's time as secretary that Theobald wrote Theobald 's two most famous works , the Policraticus and the Metalogicon .
John of Salisbury was secretary to Theobald for many years , and after Theobald 's death became Bishop of Chartres .