I find it amusing too. Most likely it is a Home for Unwed Mothers in White Rock Canada, though Stanley wouldn't have been there for being unwed.
More like her Racist Kansas parents were furious with her for getting knocked up by a Black guy in 1961, a circumstance that was a crime in many states at the time, and certainly a humiliation to a Racist Kansas family. They probably sent her up to Blaine Washington (Where her aunt lived) as was done in those times when an unwanted birth would be an occasion of great shame.
As a matter of fact, Madelyn Dunham was so ashamed of the fact that her grandson was half Black, that she didn't tell her coworkers she even had a grandson. No pictures on her Desk, nothing.
They found out when he ran for the Illinois Senate some thirty years later.
She was right to feel ashamed of him, but not because he was black. She should feel ashamed of him because he's a Lazy, Stupid, Ignorant but Arrogant Bastard. Kinda like you.
You are free to speculate . . . But speculation without evidence it is.
Or she kept Stanley Ann within reach, but out of sight, in Hawaii. One can speculate both scenarios.
Madelyn Dunham was so ashamed of the fact that her grandson was half Black, that she didn't tell her coworkers she even had a grandson.
She just had a birth announcement listed in the Hawaii papers. Well, perhaps she would be ashamed of that, too. In which case it must have come from the Hawaii D.o.H.