Hidden letters

Todd likes picking up the mail every evening on our way home. It's part of his daily chore assignment, and we mark it on his "good deeds" sheet for karate class. He also likes examining the mailing labels on letters and packages, and then divvying up the mail according to recipient (a belated THANK YOU to Grandma for sending those letters to him-- it really makes his day, and he is so excited when he sees that the something is addressed to him! He especially likes the personal letters, and asks us to read it for him as soon as he opens the envelope)

Today, there was only one letter (amongst the usual advertisements) and it was addressed to "Allan H. Knight". Todd read: "Allan H. Knight. It's for Daddy. The 'H' stands for Harvey!"

Thinking I would try to trick him a bit, I asked him: "Do you have an 'H' in your name?", fully expecting him to say no.

Instead, he thought for a few seconds, and then piped up, "Yes!"

I asked him where.

He was not to be fooled, for he replied: "In 'Knight'!"