"Expelliarmus!". A green jet of light shot from the familiar man's wand, aimed at a hooded figure. The light made contact with the figures hand a black rod flew towards the caster, who then caught it. The hooded figure ran away and disapparated.
"Bloody hell. You haven't lost your touch, now have ya Harry?" exclaimed Ronald Weasley.
"Seems so. Now what did you think McGonagall sent us here for?" asks Harry as he casts his gaze down the empty mansion. Just as his eyes scan the floor beneath, Harry notices a slight glimmer and with a flick of his wand, the trapdoor beneath a dusty old carpet creaking opens. "Nevermind, I think I found it." says Harry as he walks towards the mysterious crevice.
"Lumos..." whispered Ron as he gets closer to the door. A small ball of light emerges from the wand and gently floats towards the bottom, illuminating the dusty cellar and a rusted metal ladder.
"Whattaya suppose this is then?" asks the ginger, nervously peeping his head through the entrance.
"Must be what that guard was protecting. Come on let's explore." Harry descends the stairs and jumps from the ring to the floor, stealthily balancing himself to not fall. After taking a few steps forward, an even bigger thud followed him. "What the hell was that?!" asks Harry as he turns around to find Ron flat on his bum. With a short chuckle, Harry walks towards Ron. His chuckle lasted up until a large crack opened under Ron and swallowed the pair whole. Harry quickly pulled out his wand and with a slight murmur, he produced the Levitation spell, saving him and Ron from a 10 foot fall.
The duo recast their Illumination charms and the room lit up.
...CO M..F.Y was written on the far wall at the end. Underneath was a small chest with several layers of locks. Ron quickly approached the chest and stated that he knows what to do, and with a little incantation all the locks popped open and fell. Inside lay tons of books and different knick knacks collected for several years. Harry and Ron dug through a bit more and found a familiar book. "Bloody hell. That's Tom Riddles diary! Look there's his ring, and the locket! Harry where are we?" Ron said nervously picking up the items and dropping them into his jacket pocket that Hermione had enchanted. "I dunno but it's creeping me out. Let's get out of here." says Harry. Both pull out their wands and called for their broomstick up above. Ron got on his broom and flew like lightning to the top. As Harry situated himself, he saw something move in the corner of his eye and when he turned to face the moving object, many of the books that were in the chest were gone. All but two, small dusty leather-bound diaries. Written on the top were the years 1997-1998 and on the other had 1998-1999. Before mounting on his broomstick, Harry stashed the books in his own enchanted jacket pocket and then flew off after Ron.