Alpha Delta Theta / Phi Mu

[TSteven]

Kind of long, so please bare with me.

I recently was looking at a family member's 1931 University of Kentucky Kentuckian yearbook. In the Greeks section it listed the Beta chapter (installed at UK in 1919) of Alpha Delta Theta national sorority. Also the Alpha Gamma chapter (installed at UK in 1926) of Beta Sigma Omicron national sorority.

I did some Internet research and found out that Alpha Delta Theta was founded at Transylvania University (Lexington, Kentucky) in 1919 and that Beta Sigma Omicron was founded at the University of Missouri (Columbia, Missouri) in 1888.

Further research found that Alpha Delta Theta affiliated with Phi Mu in 1939-1940 and that Beta Sigma Omicron affiliated with Zeta Tau Alpha in 1963-1964.

I wasn't able to find anything else on the net about Beta Sigma Omicron - and I don't have a Baird's - and only the following about Alpha Delta Theta.

From NPC’s Centennial History Highlights written by Liz Rinck, editor, The Kappa Alpha Theta Magazine.

"In 1939, Alpha Delta Theta presided over the twenty-sixth congress. At the close of the meeting, Alpha Delta Theta merged with Phi Mu. The national officers of both organizations embarked on a trip to Alpha Delta Theta’s Alpha Chapter at Transylvania University to install it as a Phi Mu chapter; visits to other Alpha Delta Theta chapters followed. Hazel Falconer Benninghoven, Alpha Delta Theta president at the time of the merger, later served as Phi Mu’s national president. She is perhaps the only person to serve two NPC groups as national president."

Currently, there isn't a Phi Mu chapter at UK, nor do I think there ever was one. So I'm guessing that the Alpha Delta Theta chapter at UK was not in existence when Alpha Delta Theta affiliated with Phi Mu. Or perhaps the UK chapter decided not to affiliate. (See below for follow-up question.) And since there was already a chapter of Zeta Tau Alpha at UK, I'm guessing that if the Beta Sigma Omicron chapter was still in existence, it would have merged with the Zeta Tau Alpha chapter.

First question. Does anyone with access to a Baird's know when the Alpha Delta Theta chapter (Beta) at UK closed? And or if they (Beta at UK) ever affiliated with Phi Mu?

Now, some follow up hypothetical and/or historical questions regarding mergers or affiliations.

1. Would it be possible for an individual chapter(s) of a national or regional GLO vote to not affiliate? I guess in theory become a "local"? And if so, would they be allowed to retain their letters, symbols, even ritual, or would they have to relinquishing all to the "new" group. Whom I guess in theory might now "own" the rights to such.

2. Do alumni of an affiliated GLO "automatically" (after meeting any of the "new" GLO's requirements) become alumni of the "new" GLO? And as such, would their children be considered legacies of the "new" GLO?