I posted my info several years ago and have since found all info about them while in the US until their deaths. I just do not know what town they were from in Prussia. Have now started a search on the naturalization petitions hoping maybe to find some thread of information about what area they came from. Lodz has many Frankenstein families but I have not made a connection as yet. Morris and Samuel were born in the 1830's. Hope you have some luck in finding information.