He wrote this to a friend after little Robin's death:

"She Is Still with Us" by George H.W. Bush after the death of daughter Robin at 3 years old. Summer of 1958.
"There is about our house a need. The running, pulsating restlessness of the four boys as they struggle to learn and grow; the world embraces them...all this wonder needs a counter-part. We need a legitimate Christmas angel-one who doesn't have cuffs beneath the dress.
We need someone who's afraid of frogs. We need someone to cry when I get mad-not argue. We need a little one who can kiss without leaving egg or jam or gum.
We need a girl. We had one once-she'd fight and cry and play and make her way just like the rest.
But there was about her a certain softness. She was patient-her hugs were just a little less wiggly.
Like them, she'd climb in to sleep with me but somehow she'd fit.
Her peace made me feel strong, and so very important. 'My Daddy' had a caress, a certain ownership which touched a slightly different spot than the 'Hi Dad' I love so much.
But she is still with us. We need her and yet we have her. We can't touch her, and yet we can feel her. We hope she'll stay in our house for a long, long time."
It made my eyes leak to read this. What unending Love!