Yes, Antonie Post was a music teacher. She was also a composer. I have the sheet music for one piece. I need to check the title. I think you mentioned that you have some as well. I would love to know the titles if you do. I don't play piano but have a friend who said he would try to play the piece and record it for me. He says its pretty challenging. My Dad would love to hear it again. He says that music was a very important part of their lives. He played the viola. His first instrument was given to him by Uncle Sverre and I have it now.
Good for your Mom! Interesting how the stories go. I'll pass that on to my Dad today. My Grandfather, Carl Meyer, always told me they kicked him out of kindergarten when he was too big for the chairs!? I always loved that story.