You may not get this message since yours was posted so long ago. My name is Claudia and Heinrich August and Johanna Langwell are my ancestors. I have some information on their descendents as well as the Langwell ancestry from the Kingdom of Hanover, Prussia.
I have Johanna's will and death certificate. I have recently discovered that she is buried in San Antonio City Cemetery #1. I went there last week but was unable to find her grave (It's an entire city block). I will go back to the San Antonio Public Library because the records are now being stored there. Hopefully there will be a map of the cemetery so that I can determine where she is buried. I still don't know where or when H.A. died.
My great-grandmother, Auguste, is the daughter of Heinrich and Johanna.
Hope to hear from you soon.