Liz James schrieb:

I am trying to find the exact birth dates and or location of the children of
Emmanuel SELIGMANN born Wangen, 3 April 1852 and Jeanetta WEIL born 23 Jun
1853 Lengnau, Switzerland ...

In particular I am looking for the place of birth of Friedl and Henny, and
as I plan to be in Germany in the next few weeks I would like to ask advice
as to what archives I should contact to locate the above birth dates and
locations of the family members?

Dear Liz,

note that, apart >from Konstanz, all the places you mention are in
SWITZERLAND, not in Germany

with kind regards

Fritz Neubauer, North Germany