From a New York Times book review of a collection of writings by Christopher Hitchens – the bold emphasis is mine:
Hitchens had that quality, rarer than it should be, of knowing what to notice. In a review of Gore Vidal’s memoir, “Palimpsest,” he reminds us that Vidal wrote: “I should note that the only advantage for a child in having an alcoholic parent is that you acquire, prematurely, quite a bit of valuable data.” Spying Henry Kissinger in the Sistine Chapel gawping at the Hell section of “The Last Judgment,” Vidal commented: “Look, he’s apartment hunting.“
The complete review: