As a young debutante, Barnabas had originally chalked her up as a hindrence to be kept safe at all costs. A distraction, at best. Unfortunately for her, his chivalrous ideals had been dashed with the discomfort and pain of the boils. He was impatient to be rid of them. When she suggested that she head back into the worst of the fog, he ought to have told her it was a terrible idea. Separating was also not a great idea, though they weren't doing great at staying together anyway. If she were to volunteer to be the human sacrifice.. well... Hogsmeade had plenty of debutantes anyway...

"That could work," He told the others, "I'll take the other half this way, to see if there may be something outside that is causing it. We do not know if this is local to this spot or if it could be being cast by someone else inside the village." Anything to get him out of the itching!