I could have sworn that I posted this in this thread before, but re-reading through it, apparently I didn't (or maybe it was deleted, I don't know), but in recent years, I've developed the theory that that brick facade behind the carriage house from 1970 to 1998 with the alphabet painted on it was perhaps a brief glimpse of the exterior of a nearby alphabet factory. I mean think about it: notice how the residents of the street - particularly in the earlier years - seem to always have an abundant amount of letters (and numbers) on hand. . . . even Gordon once mentioned, "I've stepped on my 'J' many times."