Mary, Do you know where Petersburg is? That is your first project. Call the University of WI Geography research library at 1-800-558-8993 and tell them you are trying to locate a Petersburg in Bohemia and the years it would apply. They will give you latitude and longitude of possibilities. You either have to call back in a couple of days for the data or give them your Edress so they can reply by Email. If they can't find it, there is no such place in old Bohemia and you will have to look in another crownland. You might try Hungary. If you have latidude and longitude you can figure out which district it was in during the time that the Sommer books were written and learn the names of the noblemen who owned that estate from the book for that district . . Those old records of the noble family would probably include estate employment records, even after 1848 when serfs were freed. Is there any chance it should be Pressburg? Karen