"That was less than helpful, Barty, thank you." He only had one match, from what Rebecca could see, so there went that theory. But he had a match and... a candle. Maybe you had to have both to make anything out of them? Wasn't there something about candles spilling over and causing a fire? Of course! That wasn't a warning, it was a hint.
"Maybe we're going about this wrong. Did you see, he used both the match and the candle, so obviously we need both." Becca took a bundle of the candles and sat down in front of the fire place, trying to figure out how to arrange them with Lucius' neatly stacked matches. "I think we're supposed to put the candles in the fireplace, with the matches."