...Whu stood by the large rock they had
		    come to in the woods. For a while he didn’t move.
		  “What are you doing, Whu?”
		  Asking permission to take rock. Always ask before taking. Asking
		    rule very important.
		  “Who are you asking?”
		  Asking earth. Asking woods.  Asking ground. Rock belongs to
		    them.
		  Evidently whoever owned the rock gave Whu their
		    permission, for he stepped aside and waited until Aliss Elizabeth picked it up. 
		  Wait. Must replace.
		  “Replace what?”
		  When take, must leave something else behind to replace. Your
		    hat good.
		  “You want me to leave my hat as payment?”
		  Not payment, trade.
		  Reluctantly, Aliss Elizabeth took off
		    her baseball cap and put it where the rock had been. Then she picked up the
		    rock again and they headed home. The rock was indeed a ‘heavy’. She could
		    barely lift it, but carry it she did until they reached her front steps, where
		    she dropped it with such a thud that Herr Doctor came rushing outside. 
		  “Dad, please help me with this rock. It’s
		    too heavy for me to carry upstairs to my room.”
		  “Aliss Elizabeth, what on earth do you
		    want that rock in your room for?” he asked.
		  “For Whu. We’re making him a cave,”
		    she replied. 
		  “Where did you get it from?”
		  “From the woods out back.  But it is
		    okay, Daddy. Whu asked permission.”
		  “He asked permission?  Who did he
		    ask?”
		  “He asked the woods, Daddy. I left my
		    hat in trade.”
		  “You left your hat?  In trade?”
		  “It’s the Asking Rule, Daddy. Always
		    replace what you take. Whu says it is an important custom where he comes from.”
		  “I’ve heard of an asking rule,” said
		    Herr Doctor. “It’s Hawaiian. I read about it when your mother and I were there,
		    before you were born. In fact, it was in Hawaii that…” Herr Doctor stopped
		    himself. His daughter didn’t have to know everything.
		  Not just from Hawaii. All over ocean. Learned from us, long
		    ago....