Draco looked up from his paperwork at the knock. He hadn't expected that Lucius was here to see him, but as he'd arrived in the manor just before the interruption, he doubted it was Regulus. Come to think of it, he hadn't seen all that much of his cousin recently, though they did pass by each other occasionally, and Draco knew he was doing some curse breaking of his own.
Setting the quill down, he closed the ledger. He'd noted that Lucius had made some marks in the ledgers, and he had to admit he liked the adjustments and recommendations that had been scratched onto stray pieces of parchment so as not to gloss the actual ledger itself.
"Come in," he called to the closed door, releasing the lock as he did so and causing the door to crack ajar.