As far as other documents. We are searching the state naturalization papers in states where we know that Posta's settled. We have cousins who came from the Kladno NW of Prague and will eventually be inquiring in that city. My sister has been to CZ several times and has employed a CZ guide several times. This lady is willing to search church records for us even if we are not there. So this particular Posta we may not know for sure until we find written info in CZ. Also there are Posta's in so many US states that this makes the search more interesting :)