For days, they alternated.
When Hermione stayed in, she would either read the book on Horcruxes or the Tales of Beedle the Bard that Dumbledore left her. As for Harry, he mostly looked for Gregorovitch. Who is he? And why is Voldemort after him?
He looked around, but there wasn't much left after Death Eaters raided the place a year ago. The documents that were left behind were shredded, and the boxes were empty. Harry tried to put documents back together, but it was mostly sales records and financial shit that Harry did not understand.
When he wasn't looking for a mention of Gregorovitch around Ollivander's shop, he was trying to get into Voldemort's head. He convinced himself that it was to figure out the whole Gregorovitch thing, but deep down, at least partially, he hoped to catch a glimpse of Draco, some sort of confirmation that he's still alive. Harry didn't care if Draco lived or died, or so he convinced himself, but at night, when Hermione is in the deepest of sleep, he stares at the ceiling of this little shop and thinks of him.
There he was, playing with his necklace, the one Draco gave him last Christmas, and daydreaming of him. Again.
"Shit!"
He needs to get his mind off of him. He gets up and picks Hermione's book, one of them, and starts reading it. He then gets bored, so he looks for snacks in Hermione's purse. He finds a bag of crisps, a muggle snack. He recalls when Draco tried crisps for the first time.
"What is this?" Draco pulled a single crisp from the bag and examined it closely.
"Crisps!"
"And you said it's made from potatoes?" He asked, skeptically.
"Yes," Harry said, and then urged him: "try it!"
Draco very cautiously bites the crisp. It makes a crunch noise, and disintegrates in Draco's hand, getting chunks all over his robes.
"It's very messy." Draco states, but he reaches into the bag for another one.
Harry snaps out of yet another Draco flashback. He can't seem to escape him. He throws the bag of crisps back into Hermione's purse. He's not craving a snack anymore.
He turns around and faces the empty shop. There's the counter, and on top of it there was some of Hermione's stuff- mostly clothes and books. On the wall at the end of the counter was the map with the colorful pins on it. He takes a step towards it in order to examine it and study it more closely.
"Holy-" Harry trips over his duffle bag. In a failed attempt to stabilize himself, he reaches for one of the candle sconces on the wall, and as he tries to grab onto it, it spins, and Harry falls to the ground, hitting his arm agains counter.
"Ouch," he rubs his arm, and examines the bruise. However, as the shelves behind the counter start to move, he looks up in intrigue. The shelves reveal a door behind them. The candle sconce was some sort of a lever.
He got on his feet, and went through the revealed door, and down the stairs.
"Lumos," the tip of his wand illuminated the way. He followed the stairs all the way down, until he was met with another door. He tried to open it but it was locked.
"Alohomora," he tapped the door lock, and then heard a click sound. He tries to open the door again, and this time it opens.
The thick layer of dust on all surfaces in the room suggest this room has not been entered for quite some time. He looks around the shelves, examines the jars and boxes, mostly containing wand-making materials, or so Harry guessed. At the other end of the room was a desk. Harry turned to it. On top of the desk there was only a candle, which Harry lit with a flick of his wand, before holding it up and using it to inspect the contents of the drawers of the desk.
As Harry skimmed the documents and letters he found, some were from Gregorovitch himself surrounding a Death Stick, Harry hears noise upstairs.
"Harry!" Hermione is back.
He folds an old letter from Gregorovitch, shoves it into his pocket, and hurries up. When he makes it back up, he is met with Hermione holding none other than Mundungus Fletcher by his collar. They found him.