[@Ashifili]

In case Ling really did google about the telescope I have some information to tell you. Also, another thing that I remembered you mentioning a while ago; indeed the Cataloger's first treasure was one that allows tracking other treasures, it's not a map, however, but a Golden Compass that works pretty much like a Dragon Radar.

These days he has internalized most of the skills he needs, though, so the Compass is largely left as a memento. He wears it as a pocket watch, with as golden chain as well, linked to his armor's waist.