A postcard found on the street

I found this postcard poking out of a binder that was lying on the sidewalk the other day:

Dear Madeline:

I came across you at age 11 on Monday. You said hi. I said hi back.

You were riding along on your bike, with a possibly pink helmet on and a white, short-sleeved shirt. I was huffing uphill, so you were coasting down. When I looked up, you were smiling at me, smiling about yourself, was my impression. It looked like your eyeteeth had just grown back in after losing the baby ones, so maybe you were even younger than 11. You said hi, perfectly calmly. Made me smile. Pretty sure it was you.

Love,

Elizabeth Tevlin