“...he stopped mid-sentence, and their eyes met. It wasn't often that he'd ever surprised Voldemort, so he relished in the shocked look. ''Harry,'' Voldemort spoke, his voice sounding slightly raspy. For a moment, the teen wasn't sure if he'd imagined it or not. He didn't get much time to think about it however, for fury suddenly flooded his every sense, a hand caught his throat and shoved Harry into the nearest wall. The chair clattered uselessly to the floor.
''Months of silence!'' Voldemort boomed. ''And now you think you can just show up here without warning? Who do you think you are?'' Harry clawed at the hand that cut of his air supply, trying to form words and failing. Even when he stopped struggling, the man didn't let go, leaning in so close that Harry could see that Voldemort's crimson irises had flecks in them of a darker shade of red. He'd never noticed that before…
Not knowing what else to do, Harry turned to the one ability he could always use to calm the man down. He placed the hand that wasn't still grasping the locket on the other's arm and concentrated on pleasant thoughts. Flying. The D.A., his friends… slowly, the hold loosened and Harry's back slid down the wall. In that moment, he noticed that Barty had mysteriously disappeared. Coward.
Before Voldemort could continue his rant, Harry held up his other hand. ''I found this,'' he spoke, with slight difficulty as his throat was rather sore now. Taking the chain and holding the locket up into the light, Voldemort stared in silence.
''You told me that, in the unlikely case that I'd ever come across a missing Horcrux, I should return it to you as soon as possible. So, here I am. Took longer than I'd hoped-''
''Where was it?'' the man harshly cut in.
''The Black family house,'' Harry said, as he still couldn't pronounce the address due to the Fidelius charm. He could see the cogs in the man's head turning, and felt an overwhelming onslaught of different emotions as Voldemort took a step back, from rage to sadness.
''The traitor…'' he whispered in disbelief, an underlying pain in his tone that Harry found incredibly different to listen to...”
https://archiveofourown.org/works/20719073/chapters/52592182