SHIP PUZZLE
Go to the map in the library. Move the red line to the Sunken Ship. Press the picture beside the bookcase to reveal the secret passage way. Take the elevator up to the tower. Go up the key ladder and note the inscription.

Go to the planetarium. Open the door and enter. Shut of the
lights by pressing the button next to the door and have a seat. Click on the
control panel above you and enter each date and time, pressing the button
to activate the screen. You will be shown a map of the stars for that particular
day.
Did you copy down the constellations from the book in the library?
Oct. 11, 1984 10:04 AM: Leaf
Jan. 17, 1207 5:46 AM: Snake
Nov. 23, 9791 6:57PM: Beetle
Go to the birdbath with the model of the sunken ship. Press these three symbols. The ship is now accessible with a linking book inside it's room.