"What did he do with thith arrowhead?" he inquired.
"He tied it on to the end of an arrow, and shot bears with it."
"What'th an arrow?"
"A long, slender stick."
"Do you throw it?"
"You shoot it from a bow."
"What'th a bow?"
"A curved piece of wood with a string connecting the ends."
"How doeth it work?"
Roger heaved a sigh and then gave it up..