"Hello Lucius," he says, in as neutral a tone as he is capable of (not very). His face is still bloody. He raises an eyebrow at the 'thought to be dead' comment but says nothing and follows Severus inside and to the study, looking around avidly.
In the study, he takes another arm chair, noting the proprietary way Severus takes his. "I walked here," he says simply. He settles back in the chair. "Well," he begins slowly, not relishing having to go through this again. "I came to amongst the bodies of our comrades. I had a horrible head wound and they'd obviously thought me dead as well. There wasn't any guard posted," he sneers at the ineptitude, "and I was able to make my way through the tunnel into Hogsmeade and apparate away from there. No one noticed me for all the celebrating." He clenches his fists then takes a deep breath. "I've been on the run ever since. How I ended up here is...something of a mystery." He wipes a hand over his chin and grimaces at the drying blood. "This happened when I tried to leave."