"Got a gold mine, Lois?"
He was so full of the joy of it that he gasped at her reply.
"How did you know?" she asked sharply.
"I didn't."
"I thought not. Nobody knows. And nobody need know. Just between ourselves—all this."
He nodded. She was an amazing creature, this sister! The joke grew. He hoped she would delay and prolong her revelations, that he might miss nothing of their humor.
"Nevada," she remarked sententiously.
"Ground floor?"
"Something like that."
She pushed toward him the pad with her calculations. They read thus:—