The boy shook his head.
"Not now, thank you."
"Then as we have finished here shall we go up to the clay-shop?"
"Yes, I am ready," Theo affirmed. Then as if confronted by an afterthought he asked:
"Is the porcelain made here bone china or ——"
"Spar?" put in Mr. Marwood as the lad hesitated.
"I don't think I understand."
"Feldspar."
"Oh, then I know," cried Theo. "I did not realize you classified porcelains as bone or spar."