If anyone is interested in learning about some of the oldest organs in North America, I stumbled across this website today. Thought it might interest some of y'all. It's in French and English (English translations at the bottom of each page).
http://www.uquebec.ca/musique/orgues/orgueqinst.html
It could probably also be named for Cassavant Frères, as they had a hand in many of the organs of Québec, but it's an excellent resource.
I was noticing many of the rebuilds of organs of the 1920s and '30s and how they were tonally re-designed and/or re-voicedin the 1970s & '80s. The webpage is an excellent resource, and I could only find one other reference to the page on the Organ Forum.
Too bad we don't have a reference section. This page would be a wonderful reference for the organs. Hope someone finds this useful.
Michael