"Come on, then," Childermass tells the dog, gesturing for him to follow when he turns to go back across the lake. The Growlithe, of course, hops up to his feet to follow, having an easier time of crossing the ice on four legs over two once more. He keeps pace with the magicians this time, however, so there is that.

It's another long endeavor to get back to shore, even Childermass taking his time and walking carefully across the ice to avoid slipping and falling. The comment about the candle does get a, surprisingly enough, a faintly amused smirk out of the typically dour man.

"You can always get another candle, Mr. Strange. I'm sure the carnival has boxes of the very same kind in storage somewhere."

Because where else would he have gotten the first one? It can't possibly be unique. It's just wax.