In his eyes, William was going to be one of the big and powerful powerhouses in the academy during the next ten or twenty years. He also knew that his son didn't die all of sudden. And so, there were lots of chances to get that disobedient grandson under the care of William.
"Oh, how so?" William could guess a thing or two already when he started to think deeply about the hints the headmaster implied. He did something back to Berry, and there was also what happened at the Forging department.
"The forging grandmaster is fond of you, even to the extent of declaring that if anyone touched you, it would be like touching himself! Can you believe that?"
The headmaster said it in such a way while laughing, making light of this matter. William expected a long interrogation, but all he was faced with was this laugh.
And the headmaster didn't bring up the issue of Berry.
"I… Just forged a few arrow heads back there," he honestly admitted it, without delving into many details.