Classes hadn't changed much in the year Harry had been away from Hogwarts, or rather from what he learnt from his friends, classes had changed back to how they were when Harry was last a student. There was even more homework than Harry remembered, and he was helping with repairs to the school whenever he could. One upside to being busy was that he was sleeping more, it had been a few weeks since the start of term when he next found himself unable to sleep in the middle of the night. One of the thoughts keeping him awake was Malfoy. Since shaking the Slytherin's hand the first morning of the term Harry had barely seen him. They were in all the same classes and Malfoy was always there, but he arrived early and strode out of every class as quickly as possible. Malfoy never lingered anywhere. He never sat in the common room and Harry had never seen him in the library. Wondering where Malfoy was and what he was up to seemed to be part of being at Hogwarts for Harry, as much part of his life as classes, homework and quidditch. Harry grumbled at his brain for not letting him sleep. He swung his feet down from his bed grimacing when they made contact with the cold floor. He pulled on his invisibility cloak and headed for the astronomy tower. Harry had checked for Malfoy on the Marauder's map a few times, he had shown up in disused classrooms, parts of the castle that were strictly speaking off limits and most nights he appeared on the astronomy tower. Harry had left Malfoy alone before, but he knew the niggling in his brain wouldn't stop until he found the other boy tonight.

Malfoy was there as Harry was sure he would be sat on top of the astronomy tower. Tonight, Malfoy sat facing the spot Dumbledore had stood, his back to the wall, he shivered slightly despite the black cloak pooled around him. The cloak hood was down, Malfoy's blank stare fixed on the battlements opposite him, his crisp ice blonde hair stood out against the dark shadows of the night.

Harry shot a warming charm at Malfoy.

'Thanks' whispered Malfoy without looking up, his chin rested on his knees. Harry could make out that Malfoy's arms were wrapped around his long legs under the cloak.

'You're welcome.' Harry replied, reflex politeness. He stiffened, but Malfoy didn't react. Harry realised Malfoy had known all along that he was there, probably knew that it was him last time too. 'Why do you come up here?'

'Same as you I expect.' Harry doubted that, Malfoy wouldn't need to check on himself to stop his brain fussing so that he could sleep. Looking at Malfoy Harry thought that he probably should though, it looked like Malfoy hadn't slept properly for a long time. Harry knew the look of someone who didn't sleep he was intimately familiar with not sleeping.

Malfoy eventually broke the silence, it sounded more like he was talking to himself than Harry. 'He knew, all year he knew.'

'Yeah I know.' said Harry. Malfoy's eyebrows knitted together, a second later he smirked a little.

'Of bloody course you did. How?' curiosity getting the better of his annoyance. But before Harry could answer realisation had dawned on Malfoy. 'You were here weren't you? Like you are now?'

Harry nodded, then realising Malfoy still couldn't see him he replied. 'Yeah, I was by the door. He put a body bind on me.'

Draco nodded once which looked more like he was burrowing his chin further into his knee. 'Then you know, he knew. Knew what I was doing all year and he did nothing.' Harry couldn't work out how Malfoy felt, it just seemed that his mind had tripped on this point and couldn't move on.

'He told Snape to talk to you, to make sure you were alright.' Harry wasn't a hundred percent sure that was what Dumbledore had said, but it sounded better than what he remembered the old man saying in Snape's memory.

Malfoy snorted. Most people who snort sound ridiculous, Malfoy sounded derisive. It reminded Harry of Malfoy from before Voldemort came back.

'Snape had to help me. Bellatrix,' he said the name like it was a venomous snake, 'made him make an unbreakable vow with mother.'

'Yeah, I know that too.' Harry said.

'Christ sake Potter, is there anything you don't know?' Malfoy looked round in the general direction Harry was stood. Malfoy's gaze wasn't blank anymore but still lacked any emotion. Before the war Malfoy had been an open book, Harry remembered him being smug, gleeful, proud, shocked, vicious, furious and vindictive. Harry remembered a smirk, or a curled upper lip, eyes slanted, eyes frowning, Harry remembered seeing all Malfoy's emotions show on his face, his eyes flashing especially fiercely when he was happy, angry or scared. Now there was barely a flicker in Malfoy's eyes, like all the pages had been ripped out the book. Harry wondered where such poetic ideas came to him from.

'I know the facts.' Harry said tentatively.

'You want to know how I feel Potter?' Malfoy tried to sound scathing, but it lacked his usual bite. He sighed and shivered again. Harry shot another warming charm at him. 'He knew. All year he knew, and he just let me carry on. He could have done something, he was the most powerful wizard alive, he could have helped me. He didn't care about us.' Malfoy swatted quickly at his nose and cheeks; he pushed himself up and turned towards the door.

'Where are you going?' Harry asked surprised by Malfoy's sudden movement.

'Bed.'

'You'll get caught walking round the castle like that.'

'I'm hardly scared of getting a detention Potter. If I get caught breaking any rules it's Azkaban.' As Malfoy swept through the doorway Harry was sure he heard him mutter, 'where I belong'.