Well, it's not Anne herself but Anne as channeled by Melanie Benjamin in her novel "The Aviator's Wife," which is told in the first-person voice of Anne Morrow Lindbergh. Benjamin read through Lindbergh's diaries and personal papers as part of her research for the book, so these comments on how her child-emptied house in Darien, Connecticut felt to the mother of five grown children presumably mirror the Aviator's Wife's feelings:
"It's the quiet that you notice, first, when the children begin to leave.
And not just the practical fact that the record player is unplugged, the radio turned off. Nor simply the lack of some instrument being practiced behind closed door. Not merely the silent phone, the absence of stampeding feet up and down stairs, the slamming of doors, the constant rush of water in the bathroom.
It's more than that--less than that, too. It's a hum, a vibration that leaves when they leave. For all of a sudden the very air in the house is slower, duller; gentler against your eardrum. "