MY 8-YEAR-OLD SON GAVE UP HIS LUNCH MONEY TO BUY A LITTLE GIRL WITH DOWN SYNDROME A RED DRESS — THE NEXT MORNING, OUR LAWN WAS COVERED WITH FIFTY LUNCHBOXES.

I couldn’t sleep after the birthday party. I sat up all night. And I thought: if a child can give up thirty lunches, an old man can give up his hiding place.

The money in this box is for Lucy. Her therapies, her future, whatever Rachel decides. It should have come nine years ago. It’s Daniel’s college fund, which he doesn’t deserve, and every dollar I’ve saved since, which I don’t deserve to keep.

But the money is the easy part. Any coward can mail a check.

The hard part is the note taped to the biggest box, telling you to open it first — because it means I have to walk out my front door this morning, cross four houses, and finally introduce myself to the granddaughter I let a stranger’s little boy love better than I did.

Will you walk with me,HIS Noah?

I don’t think I can knock on that door alone.