Helene,
Were you ever able to determine who Catherine Gilb was? I have a lot of Gilb info but can't figure out who she could have been. Do you have info prior to Franz Josef? If not, I can give you some data but don't have a lot. I just found the Lanzet "connection" to our Gilb family and am in the process of working on it. I look forward to hearing from you.
Melanie