Another Source for Suzanne Delage

Okay, the Proustian influence on SD is well-established; now to bring in another of Wolfe's well-known favorites. I chanced across this today: A thing can sometimes be too extraordinary to be remembered. If it is clean out of the course of things, and has apparently no causes and no consequences, subsequent events do not recall it, and it remains only a subconscious thing, to be stirred by some accident long after. [...] The source? GK Chesterton's "The Man Who Knew Too Much," the opening of Chapter V.