Jacob had a quick walkthrough of the observatory. Why would there be anything of interest in the observatory... then again, why were the other items in the other places, they really didn't belong.

Where were you mister item.

After about 10 minutes of searching the observatory he found what he was here for.

Grabbed the item, dropped it in the back and crossed it off the list. Then he left to the next location... where ever it may be.