Burgsinn records and the Schiff and Stein family

Try contacting Konrad Weigelt. I think he has them.
paul46_60@yahoo.de

If it doesn't work you can contact Wuerzburg staatarchive. They have these records.
+49931355290
E-mail: poststelle@stawu.bayern.de

If you ever succeed in getting copies of the records I wil be very happy to have a copy.

Good luck,

Tal

I have found some answers to your questions:

1. Isaak's wife was Bine geb. SELIGER from Orb. she was the daughter of Seligmann SELIGER and Amalie? Wahl___? (im not sure about the name of his mother. hard to read)

2. see here:
https://www.geni.com/family-tree/index/6000000053925015353