Greg was just beginning to process the situation - stranger, drawing, 'light' was starting to make some sense - when she spoke again and Greg frowned. "I'm not lost. I live here. " He waved in the vague direction of McHavelock's. Looking down again he confirmed that he definitely didn't know this persona and that, therefore, she had probably been calling him stupid. Past experience taught him that most people were - even people who offered to help. "I don't need help," he reiterated. Maybe he had no idea what he was going to do with himself until his lunch break was over - he didn't like to go home in the middle of the day because Mrs McHavelock had started to complain that he was 'bothering' her or her customers when he did so - but that was no business of anyone else's.
"What are you doing on the floor?" he asked, because she kept moving around but she hadn't got up. "It's cold." Greg had warming charms on his cloak but it was still too cold for a picnic, or for ice cream.