vacant position

Exploration Stage: Crystals
From: Yui
Description: The wise man's sundial was almost ready to be repaired, but it needed to be assembled the right way. Mannen continued to study the celestial bodies to improve the clock's accuracy. We need the quadrant he used. Could you find it for me?
Completed: It seems that with the ancient quadrant that was found, it would be possible to calculate the height of a celestial body above the horizon and assemble a sundial with great accuracy. The ruler provided financial support so that Mannen could live a leisurely life, but Mannen did not stop inventing until the end.