If you don't want to know the circumstances surrounding Sunday's entry in this slideshow, then don't read any further...
[spoiler]Sunday's quote:
Ep #639 (1968) - Amy - 'It's bigger than any house I've ever seen. It MUST have a hundred rooms.'
From "Robservations 9/10/02 - #639/640 - Ghosts and Werewolves, Oh My!"
if she isn't afraid, he'll be going, he says, but she asks him to stick around and talk. They sit by the fire. Amy asks what it's like living at Collinwood. Like any other place, he says. She remarks on how huge the house is. David says no one has ever counted the rooms--there's a whole wing, the west wing, closed off all the time--I don't want to tell you why, it will keep you awake (isn't he cute?) She guesses it's haunted, and bets he's never been to the west wing. I sure have, he insists. Is it true it's haunted? She asks. Maybe, says David.
[/spoiler]
The Robservations only references when the quote comes up...
And this is the third quote from this ep. The first (Julia - 'Amy, you MUST realize that I am responsible for you') was back on September 6th, and the second (Julia - 'If you saw it, Mrs. Stoddard, there MUST be some explanation for it') was back on December 21st.