Maybe my previous email did not reach you (I sent it private). In any event, I believe you are the person who is now in contact with someone of former convent of Franciscains who indicated that a Dr. Cordier had clinic in Chant d'Oiseaux, no longer active. My contact told me they had received a similar request as mine a few days ago.He thought that it is likely that a Jewish child may have been born and/or hidden in this Clinic not existing any longer. He would be asking one of Docteur's daughter when and if he sees her.
Let me know if you need further help. I live in Brussels and I am a volunteer for The Hidden Child Foundation/ADL in New York. I'd be glad to help.