"She didn't know either, but she knew the right person to find out."
And he describes the princess's miniature and amusingly sidetracked quest to find a good librarian for about five minutes.
Once she meets one, "The librarian was interested in the Moonbeam too, but she wanted all the books its computer surely had stored. They had the same goal for different reasons, so they could work together. The librarian found old stories about a piece of lost technology that could find the Moonbeam, and the princess set out to find the man who had it. This man turned out to be a retired captain. He was much too old to go off on an adventure, but when the princess explained her quest he was happy to sell her the scanner that could do it."