[Mithadan]

As I said, I was speculating. Certainly, Gandalf was interested in researching the Ring. But at the same time, Sauron had arisen, and Gandalf was destined to become his "chief foe." The Ring had not yet been found, and Saruman had suggested that it would not be found. Gandalf was tasked with opposing Sauron under any circumstances, one of which was the possibility that the Ring might reappear. Logically, he would cast a wide net in his perusal of Gondorian lore.