Curufin chuckles craftily. He has brains and he knows it. But it is kindly of Maglor to point this out.

He nods to Maglor's sensible suggestion, goes to get the canteens full of water, and brings back two. He hands one to his brother. "Here you go."

He takes a long drink from his own, and then he wipes his mouth and sets it down. "Whew! That was good. We've been working hard, and I was thirsty."

Then he surveys the incomplete structure and considers how best to direct the stones. "Ready to have at it, once more?"