"Myself, Clive, Jose, Al and Kurt are experienced SCUBA divers," Dirk said.
"Even though I am a powerful swimmer, deep diving is out of the question," Ms. Swimmer said. She was looking around the room for clues as she was mostly illiterate.
"Ms. Swimmer, you shouldn't be in the water with your injuries anyways," Dr. Zanasiu replied.
Mr. Bigmouth held his chin in thought. "We've got fire and water. Wait, Stripetail, perhaps we are looking at an elemental link. We've found earth, represented by the underground ballroom; fire, represented by the diamond; aether, represented by the moon and water, represented by the trident! So the missing element may be air!"
"Mr. Bigmouth, I think you may be onto something!" Strut said. He was browsing an old book on pharmacology.
"So that means that we'll need to find a book on weather?" Deimos asked. He was reading a book on ancient weaponry.